Multiple Bonds Between Metal Atoms / 17-back-matter

		Multiple Bonds Between Metal Atoms	807
		Appendix
nitme	2,4,4,5,5-pentamethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-N-
	oxide
nitph (NITPh)	2-phenyl-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-
	oxyl-3-N-oxide
5-NO2salpy	(2-pyridyl)-2-oxy-5-nitrobenzylaminato
np	1,8-naphthyridine
1,4-nq	1,4-naphthoquinone

	O
OBQDI	o-benzoquinodiimine
O2CArtol	2,6-di(p-tolyl)benzoate
5S-ODPY	octadecyl 2-oxopyrrolidine-5(S)-carboxylate
OEP	dianion of 2,3,7,8,12,13,17,18-octaethylporphyrin
OMP	dianion of 2,3,7,8,12,13,17,18-octamethoxyporphyrin
OTf	triflate
OTs	anion of toluene-p-sulfonic acid
oxodmnp	2-oxo-5,7-dimethyl-1,8-naphthyridine

	P
PC	orthometalated phosphine
pcp	methylenbis(phosphinate), CH2[P(O)OH]22<
PCy3	tris(cyclohexyl)phosphine
pdc	pyroledithiocarbamate
pdz	pyridazine
c-Pen	cyclo-C5H10O
peptea	pentapyridyltetraamide
Ph2Ppy	2-diphenylphosphinopyridine
phdpda	phenyldipyridyldiamide
phen	1,10-phenanthroline
PhIP	anion of 2-phenyliminopiperidine
PhNPy	anion of 2-anilinopyridine
PHOX or 4S-PHOX	4(S)-phenyl-oxooxazolidine
PhPcF	phenylpicolylformamidinate
PhPpy2	phenylbis(2-pyridyl)phosphane

808Multiple Bonds Between Metal Atoms Appendix

phpy	anion of phenylpyridine
PhPyBz	phenylpyridylbenzamidinate
PhPyF	phenylpyridylformamidinate
Phth	phthlamide
phz	phenazine
plpyz	2-pyrrolyl-1-pyrazine
p nitpy	2-(4-pyridyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-
	oxyl-3-N-oxide
PNP	2,6-di[(C6H11)2P]pyridine
pop	pyrophosphate, O[P(O)OH]22<
pqdi	9,10-phenanthroquinonediimine
pydz	pyridazine, N2C4H4
pymSH	pyrimidine-2-thione
pynp	2-(2-pyridyl)-1,8-naphthyridine
pyphos	6-(diphenylphosphino)-2-pyridonate
pypz	pyrido[2,3-b]pyrazine
pyrimethamine	2,4-diamino-5-p-chlorophenyl-6-ethylpyrimidine
pyrr	_-pyrrolidonate, C4H6NO−
pyS	anion of 2-mercaptopyridine
pySH	2-mercaptopyridine
pyz	pyrazine
pz	anion of pyrazole

	Q
quin	quinuclidine
quinCO	8-quinoline acyl
	R
RcCO2	ruthenocenecarboxylate
Roll-3696	1-(2-hydroxy-3-methoxypropyl)-2-methyl-5-nitroimidazole
	S

salpy	(2-pyridyl)-2-oxy-benzylaminate
SCF-X_-SW	self consistent field-X_-scattered wave

		Multiple Bonds Between Metal Atoms	809
		Appendix
silox	OSi(But)3
s-pqdi	9,10-phenanthrosemiquinonediimine
stf-CN	[2]staffane-3-carbonitrile

	T
TBDMS	tert-butyldimethylsilyl
TBSP	1-[(4-But-phenyl)sulfonyl]-(2S)-pyrrolidinecarboxylate
Tcbiim	dianion of tetracyanobisimidazole
tclH	τ-thiocaprolactam
TCNE	tetracyanoethene
TCNQ	7,7,8,8-tetracyanoquinodimethane
tdpm	(Ph2P)3CH
tempo	2,2,6,6-tetramethylpiperidine-1-oxyl
tempol	2,2,6,6-tetramethyl-4-hydroxypiperidinyl-1-oxy
temyl	1,3,4,5-tetramethylimidazol-2-ylidene
teptra	tetrapyridyltriamide
tetraphos-1	Ph2P(CH2)2P(Ph)(CH2)2P(Ph)(CH2)2PPh2
tetraphos-2	P(CH2CH2PPh2)3
TFA	trifluoroacetate
tfepma	bis(bis(trifluoroethoxy)phosphino)methylamine,
	MeN[P(OCH2CF3)2]2
2-THCO2	2-thienylcarbonylate
3-THCO2	3-thienylcarbonylate
2,5-TH(CO2)2	2,5-thienyldicarboxylate
THREOX or 4S-THREOX	threonine-based-oxooxazolidinone-4(S)-carboxylate (5(R)-
	methyl-2-oxooxazolidine-4(S)-carboxylate)
tht	tetrahydrothiophene
TiPB	2,4,6-tri-isopropylbenzoic acid
TMB	2,5-di-isocyano-2,5-dimethylhexane
tmed or tmeda	Me2N(CH2)2NMe2, tetramethylethylenediamine
tmph	thiamin monophosphate (phosphate ester of vitamin B1)
TMP	2,4,6-trimethoxyphenyl anion
TMPP	2,4,6-trimethoxyphenylphosphine

810Multiple Bonds Between Metal Atoms Appendix

tpyethebz	1,3,5-tris[(2-pyridyl)ethenyl]benzene
tmtaa	dianion of 5,7,12,14-tetramethyldibenzo[b,i]-
	[1,4,8,11]-tetraazacyclotetradecine
	(benzotetramethyltetraaza[14]annulene)
tmtu or tmu	1,1,3,3-tetramethyl-2-thiourea
TOEP	meso-(4'-tolyl)octaethylporphyrin dianion
TolN5Tol	di-p-tolylpentaazadienate
TolPyF	p-tolylpyridylformamidinate
tpda	tripyridyldiamide
TPG or tpg	N,N',N"-triphenylguanidinate anion
TPP or tpp	tetraphenylporphyrin dianion
tppz	2,3,5,6-tetra-2-pyridylpyrazine
tpy	2,2':6,2"-terpyridine
trimethoprim	2,4-diamino-5-(3',4',5'-trimethoxybenzyl)pyrimidine
triphos	Ph2P(CH2)2P(Ph)(CH2)2PPh2
tRNAphe	transfer RNA of the amino acid phenylalanine
TTB	2,4,6-tri-p-tolylbenzoate
ttf	tetrathiafulvalene
2-TU	thiouracil anion

	X
Xhp	substituted 6-hydroxypyridinate anion

Index

A
assemblies containing
Mo24+ complexes.................	148-168, 222-223
Re2n+ complexes (n = 6, 5 or 4) .........		287, 291,
	332, 338-340, 357
Rh24+ complexes ................	483-485, 487-492,
	516-518, 548-555
Ru25+ complexes .................................		400-401
W24+ complexes ........................................		188
B
bond energies of M–M bonds..................		721-724
bond lengths
atomic number, dependence on ..........		713-715
bond order, dependence on .................		707-710
effect of axial ligands on .....................		712-713
bond orders
bond length correction with ...............		707-710
definition of ................................................		13
bridging ligands stabilizing metal–metal
multiple bonds, classification of.......................		18
C
CD spectra of compounds with
M–M quadruple bonds ...........................		758-760
cobalt compounds, metal–metal
bonding in..............................................		451-455
Cr25+ compound..........................................		56-57
Cr24+ compounds
affect of axial ligation in.........................		40-43
A-frame-like structures in ...........................		64
amidate ligands in..................................		50-52

amidinate ligands in...................		52-55, 58-59
bridging amido ligands in..........		49, 57-58, 64
carbonate ligands in ....................................			38
carboxylate ligands in...........	35-43, 46, 55, 61
Cr–C bonds in.................	43-46, 52-53, 60-61
Cr–Cr bond distances in .......		36-37, 50-51, 54
electronic structures of ................................			65
guanidinate ligands in.................................			56
intramolecular axial interactions in.........			57-59
macrocyclic anionic chelating
ligands in..........................................			61-62
2-methoxyphenyl ligands in...................			43-45
N–C–N type divergent-bite ligands in...			62-64
2-oxophenyl ligands in...........................			45-46
2-oxopyridinate and related
ligands in....................................		47-50, 59
‘super-short’ Cr–Cr bonds in ..................			43-50
D
β–β* transitions
Cr24+ compounds .......................................			750
Mo25+ compounds......................................			750
Mo24+ compounds...............	744-750, 758-759
Os26+ compounds.......................................			757
Re26+ compounds.......................		746, 749, 760
Re25+ compounds........................		746, 752-753
Ru25+ compounds ......................................			757
Tc25+ compounds ................	745-746, 749-751
theory of.............................................		739-744
double metal–metal bonds
Ir26+ compounds containing.......................			457
Nb26+ compounds containing		.................	31-32
Os24+ compounds containing ......		438, 442-444
Re39+ compounds containing..........................			3
Re26+ compounds containing .............		300-301,
		331-332
Ru24+ compounds containing......		405-414, 422

811

812Multiple Bonds Between Metal Atoms Index

E
electron density maps, calculation of		.............. 738
electronic absorption spectra
Cr24+ compounds .......................................		750
effect of pressure on...................................		765
Mo25+ compounds......................................		750
Mo24+ compounds...............	745-750, 753-755
Os26+ compounds........................		442-443, 757
Pt26+ compounds .......................................		757
Re26+ compounds................	746, 749, 751-752
Re25+ compounds........................		746, 752-753
Rh24+ compounds ...............................		756-757
Ru25+ compounds ......................................		757
Tc25+ compounds ................	745-746, 749-755
electronic structure calculations
Cr24+ compounds ................................		728-729
Mo26+ compounds...............	729-730, 733-738
Mo25+ compounds......................................		738
Mo24+ compounds.......................		725, 727-729
Nb24+ compounds......................................		727
Os26+ compounds.......................................		725
Pt26+ compounds .......................................		738
Re26+ compounds................................		725-727
Re24+ compounds.......................................		738
Rh24+ compounds ...............	727, 731-732, 738
Ru25+ compounds ...............................		732-733
Ru24+ compounds ..............................		727, 733
Tc25+ compounds .......................................		725
Tc24+ compounds .......................................		727
W26+ compounds ........................		729-730, 737
W24+ compounds ........................		725-726, 728
electron paramagnetic resonance
spectra....................................	441-442, 783-785
emission spectra of compounds with
M–M quadruple bonds ...........................		762-763
EXAFS measurements ............................		785-786
excited state distortions of M–M
bonded compounds.................................		760-761
extended metal atom chains (EMACs)
chromium compounds with...............		671-673,
682-683, 686, 698, 703
cobalt compounds with ..............		686-693, 703
copper compounds with .............		694, 697-700
iridium compounds with............		461-462, 702
iron compounds with ................................		698
ligand bridges present in....	669-671, 698-700
metal–metal distances present in		.......674-681,
		684-685, 699

nickel compounds with .....................		694-697,
		700-701, 703
platinum compounds with ................		658-661,
		702-703
rhodium compounds with .................		536-540,
		701-702
ruthenium compounds with	...............	701-702
F
formal shortness ratios for multiple bonds			....... 47
H
heteronuclear diatomic compounds
[CrMo]4+ core in...........................		43, 145-146
[MoOs]n+ core (n = 4 or 5) in ............		146, 148,
		438-439
[MoRe]5+ core in .......................		146, 148, 291
[MoRu]n+ core (n = 4 or 5) in ....		146, 148, 422
[MoW]5+ core in .......................................			196
[MoW]4+ core in ................	145-148, 196-197
[OsW]4+ core in ........................................			438
[RuOs]4+ core in................................		422, 438
[RuW]4+ core in ........................................			422
I
internal flips of M2 units .........................		718-720
internal rotation
effect on bond length of......................		711-712
effect of β bonding on ........................		710-712
Ir26+ compounds......................................		456-457
Ir25+ compounds......................................		455-457
Ir24+ compounds
anionic bridging ligands in ................		455-461
intramolecular disproportionation in ..456-458
Ir–Ir bond distances in .......................		455-456
/-acceptor ligands in..........................		458-461
unsupported Ir–Ir bonds in .......................			458
iridium blues..........................................		461-462
iron compounds, metal–metal
bonding in..............................................		447-450
isomers of M2X8-nLn species
types of .......................................................			17
mechanisms for the
interconversion of .........................		718-720

M
Mo412+ tetranuclear clusters.....................		218-223
Mo48+ compounds of the type
Mo4X8(PR3)4 (X = Cl or I) ......................		165-166
Mo26+ compounds
alkoxide ligands in ....	205-207, 210, 213-228,
	230-234, 236-237, 239
alkynes, reactions with ..............................			234
amido ligands in ...............	205-206, 210-217,
			224-228
arsenate ligand bridges in............................			94
bonding in triply bonded
Mo2L6 molecules ...........................			208-209
calixarene ligands in..................................			228
carboxylate ligands in................................			229
cleavage of triple bond in ...................			231-234
CO, reactions with .............................			232-233
COT ligands in ..........................		207-208, 210
cyclopentadienyl ligands in ................			210-211
`-diketonate ligands in .............................			225
ethane-like structures of .....................			203-204
intramolecular disproportionation in .........			226
isocyanides, reactions with ........................			234
Mo–C bonds in .........	204, 207-208, 210-217,
	222-223, 228-229
Mo–Mo bond distances in ..204-205, 213, 224
Mo2X6-nYn molecules ..........................			210-218
nitriles, reactions with........................			236-237
phosphate ligand bridges in ........................			94
oxidation of Mo24+ compounds to give			.......139
phosphido ligands in ..................		210, 213-216
phosphine ligands in .........................		223, 228
redox chemistry of..............................			230-232
thiolate/selenate ligands in ...............		208, 213,
		215-216, 236
triazenate ligands in ..................................			227
Mo25+ compounds
oxidation of Mo24+ compounds to give			.......139
phosphate ligand bridges in ........................			94
sulfate ligand bridges in ......................			92, 139
Mo24+ compounds
affect of axial ligation in..............................			73
alkoxide ligands in .....	116, 134-135, 217-218
amidate ligands in........	97, 152-153, 156-159
amidinate ligands in....................		98, 101-103,
	141-142, 155-167
anionic N,N bridging ligands in		..98-103, 217
anionic O,S and S,S ligands in ............			103-105
carbonate ligands in ...........	161-163, 167-168

Multiple Bonds Between Metal Atoms 813

			Index
carboxylate ligands in....	69-92, 106, 138-139,
	151-152, 154-158,
	160-164, 166-167
cationic complexes of..........................			130-132
cleavage of quadruple bond in		............	136-137
guanidinate ligands in...............................			141
halide anions of the type [Mo2X6(H2O)2]2+
(X = Cl, Br or I) in	.......................		106-108
halide ligands in, see [Mo2X8]4- ions
homoleptic acetonitrile cations of .......			130-131
hydride ligands in .....................................			142
intramolecular disproportionation in .135, 218
macrocyclic anionic chelating
ligands in......................................			132-133
mixtures of carboxylate with
other anionic ligands in....................			79-92,
			99-100, 106
Mo–C bonds in ..........	115-116, 137, 142-145
Mo–Mo bond distances in .........		71-73, 80-84,
92, 96, 106, 115-118, 131-132,
148, 156-157, 161, 163-164
[Mo2X8H]3- salts (X = Cl, Br or I)
formed by oxidation of..................			108-110
2-oxopyridinate ligands in..............			95-97, 127
phosphine ligands in .................		77-78, 87-90,
	112-130, 137, 142-144
polyoxoanion bridges in .........................			92-95
porphyrin ligands in...........................			132-133
redox chemistry of.................		92-94, 108-110,
127-130, 134, 137-142, 153-154
Mo22+ compound containing
F2PN(CH3)PF2 ligands...................................			138
[Mo2X8]4- ions (X = Cl, Br, CN or
NCS), salts containing
molecular structure of ....................			69-70, 106
synthesis of.............................		69, 97, 106-107
Mo2X4(PP)2 compounds (X = halide;
PP = bidentate phosphine),
_- and `- isomers of..........	113-114, 117-118,
		120, 123-129
multiple bonding, distribution
within the transition elements ....................			16-17

N

Nb26+ compounds, double bonds in ............	31-32
Nb24+ compounds
7-azaindole ligands in ............................	30-31
calix[4]arene ligands in ..........................	31-32

814Multiple Bonds Between Metal Atoms Index

guanidinate ligands in............................	29-30
Nb–Nb bond distances in ...........................	29
nickel compounds, metal–metal
bonding in..............................................	633-634
Noddack, Walter and Ida, discovery of
rhenium by.............................................	271-272
O
ORD spectra, see CD spectra
orientation disorder of M–M units
in crystals ...............................................	715-718
Os27+ compounds
guanidinate ligands in...............................	435
magnetic properties of...............................	439
Os–Os bond distances in ...........................	435
Os26+ compounds
amidate ligands in.............................	432, 441
amidinate ligands in..........................	432, 440
anionic N,N bridging
ligands in..............................	432-433, 442
carboxylate ligands in.........	432-436, 438-443
cleavage of triple bond in ...................	434-437
electronic structures of .......................	439-443
halide ligands in, see [Os2X8]2- ions
magnetic properties of........	435-436, 439-442
orthometalated ligands in...........	433-434, 441
Os–C bonds in ...................................	432-436
Os–Os bond distances in ............	434-435, 437
2-oxopyridinate ligands in..........	432-433, 441
phosphine ligands in ..................	433-434, 441
porphyrin ligands in...........................	434-444
redox chemistry of.............................	437, 439
spectroscopic properties of..................	442-443
Os25+ compounds
carboxylate ligands in.................	437-438, 441
electronic structures of .......................	441-442
magnetic properties of................	435, 441-442
Os–Os bond distances in ...........................	435
2-oxopyridinate ligands in..........	437, 441-442
phosphine ligands in .................................	438
porphyrin ligands in...........................	434-444
spectroscopic properties of..................	441-442
Os24+ compounds, porphyrin
ligands in .......................................	438, 442-444
[Os2X8]2- ions (X = Cl, Br or I), salts containing
cleavage of triple bond in ...................	436-437
electronic structure of................................	441

molecular structures of ..............................			436
redox chemistry of..............................			442-443
synthesis of................................................			436
P
paddlewheel molecules with
unsymmetrical ligands, regioisomers of			........... 18
palladium compounds, metal–metal
bonding in..............................................			634-636
Peligot, Eugéne-Melchoir, discovery of
dichromium (II) carboxylates by .................			10-11
photochemical reactions of compounds
with M–M quadruple bonds ...................			763-765
photoelectron spectra (UV)
allyl compounds ........................................			775
Cr24+ compounds ........................		766-771, 775
M2X6 (M = Mo or W) molecules		........	773-774
M2Cl4(PMe3)4 compounds
(M = Mo, W or Re) .............................			772
Mo26+ compounds...............................			773-774
Mo24+ compounds...............................			766-775
paddlewheel molecules .......	766-771, 774-775
Re26+ compounds.......................................			766
Re24+ compounds........................		772-773, 775
Rh24+ compounds ......................................			774
Ru24+ compounds ...............................			773-774
W26+ compounds .......................................			773
W24+ compounds ................................			766-773
platinum blues .......................................			658-661
Pt26+ compounds
amidate ligands in..............................			648-651
amidinate ligands in..................................			648
anionic N,O bridging ligands in		........	648-654
anionic N,S bridging ligands in .........			655-656
carboxylate ligands in.........................			646-647
electronic structures of ..............................			636
guanidinate ligands in...............................			648
2-oxopyridinate ligands in..................			651-652
polyoxoanion bridges in .....................			642-643
Pt–C bonds in ....................	647, 649-653, 661
Pt–Pt bond distances in .....................			637-641
pyrophosphite ligand bridges in .........			644-646
unsupported Pt–Pt bonds in...............			656-657
Pt25+ compounds.....................................			657-658

Q
quadruple metal–metal bonds
Cr24+ compounds containing.......		10-12, 35-65
discovery and initial characterization
of Mo2(O2CCH3)4 ................................		9-10
Mo24+ compounds containing......		8-10, 69-168
qualitative bonding treatment of		............13-15
Re26+ compounds containing .....................		7-8,
273-301, 364-365
recognition of existence in
Cr2(O2CCH3)4·2H2O .........................		10-12
Tc26+ compounds containing...............		252-260
W24+ compounds containing ..............		183-196
R
Re39+ clusters, recognition of Re=Re
bonding in.........................................................		3
Re28+ compounds, electron-poor
triple bond in .........................................		360-361
Re27+ compounds, paddlewheel
structure of....................................................		307
Re26+ compounds
alkyl ligands in .................................		289, 300
amidate ligands in......................		296-297, 365
amidinate ligands in...........................		295-296
carboxylate ligands in.........................		282-292
cleavage of quadruple bond in ....		362-363, 365
`-diketonate ligands in ......................		292-293
halide ligands in, see [Re2X8]2- ions (X = F, Cl,
Br or I)
intramolecular disproportionation
reactions of ...........................		290-292, 302
2-mercaptopyridinate ligands in	.........	294-295
2-oxopyridinate ligands in..................		294-295
phosphine ligands in ..........................		298-300
polyoxoanion bridges in ............................		293
Re–Re bond distances in .... 275-278, 364-365
redox chemistry of..............................		303-308
thiocyanate ligands in ........................		280-281
thioether ligands in ...................................		301
Re25+ compounds
amidate ligands in.....................................		307
amidinate ligands in..................	307, 333, 360
bidentate phosphine ligands in..........		322-327,
333, 335-338, 340-341
bidentate thioether ligands in.............		302-303
carboxylate ligands in................	306-307, 333,
335-338, 340-341

Multiple Bonds Between Metal Atoms 815

Index

2-mercaptopyridinate ligands in.........			306-307
monodentate phosphine ligands in ...........			309,
		314-322, 335, 337
2-oxopyridinate ligands in	..................		306-307
Re–Re bond distances in ....................			312-313
redox chemistry of......................		315-322, 335
Re24+ compounds
alkyl ligands in .................................			309, 327
allyl ligands in ...................................			359-360
amidinate ligands in..................................			365
bidentate and tridentate phosphine
ligands in......................................			322-341
carboxylate ligands in.........................			333-341
cleavage of triple bond in ...........		362-363, 365
`-diketone ligands in .........................			340-342
electron-rich triple bond in ........		302, 313-314
homoleptic acetonitile cation .................of			360
monodentate phosphine
ligands in......................		309-322, 329, 359
phthalocyanine ligand in ...........................			360
porphyrin ligands in..................................			360
Re–Re bond distances in ....................			310-312
redox chemistry of.............		315-322, 326-327,
331-332, 334-335, 359
[Re2X8]2- ions (X = F, Cl, Br or I), salts containing
molecular structure of ...................		6, 274-275,
		278-280, 364-365
recognition of existence of
multiple bonding in .............................			7-8
redox chemistry of..............		303-304, 307-308
synthesis of.........................		273-274, 278-279
Re2Cl6(µ-dppm)2, the Re=Re
bond in...................................		300-301, 331-332
Re2X4(PP)2 compounds (X = halide;
PP = bidentate phosphine),
_- and `- isomers of ...............................			321-325
Re2X4(µ-dppm)2 (X = halide) complexes,
see also Re24+ compounds, reactions with CO,
isocyanides, nitriles and alkynes with
retention of Re–Re bonding in ...............			342-359
[Re2X3(µ-dppm)2(CO)(CNR)]+ cations
(X = Cl or Br; R = alkyl or aryl),
structural isomers of ...............		343-344, 353-355
[Re2Cl2(µ-dppm)2(CO)(CNXyl)3]n+ species
(n = 2, 1 or 0), structural isomers ...............of			356
rhenium, discovery of the element .................			271
Rh26+ compounds....................	540, 542, 546-547

816Multiple Bonds Between Metal Atoms Index

Rh25+ compounds
amidate ligands in..............................			543-544
amidinate ligands in...........................			544-546
anionic N,N bridging ligands in ........			544-547
carboxylate ligands in.................		541-543, 545
electronic structures of .......		540, 543-544, 546
Ru–C bonds in...................................			546-547
Rh–Rh bond distances in ...................			540-541
Rh24+ compounds
amidate ligands in.....	510-511, 543-544, 557,
565-566, 591-598, 611-612
amidinate ligands in..........		512-514, 544-545,
548-555, 557, 559-560, 563-656
anionic N,N bridging ligands in .......			512-521,
			544-546
anionic N,O bridging ligands in ........			505-512
biological significance of ....................			555-566
carboxylate ligands in........		466-506, 509-514,
		525-531, 541-543,
548-567, 599-605, 609-611
catalytic activity and applications of...			591-627
chiral ligands in .................		591-598, 609-612
cleavage of the Rh–Rh bond in .................			547
`-diketone ligands in ........................			501, 531
electronic structure of........................			465, 512
homoleptic aquo cation ......................			528-529
homoleptic nitrile cations...........		529-530, 566
isocyanide ligands in ..........................			533-535
macrocyclic ligands in	........................		531-533
multidentate heterocyclic amine
ligands in.............	501-505, 511, 513-514,
520, 553-554, 556, 563-565
nitrile ligands in .......	487-488, 492, 501-506,

510, 513-514, 520, 526, 545, 548, 551-554, 562, 564, 566 organic transformations catalyzed by ..591-627

orthometalated ligands in.................		502, 520,
525-526, 551-552, 599-605
2-oxopyridinate ligands in..................		505-510
phosphine containing bridging
ligands in.............	524-527, 535, 551-552,
		556, 566, 599-605
photochemistry of ..............		563-564, 566-567
polyoxoanion bridges in .............		527-528, 547
porphyrin ligands in...........		531-532, 552-553
redox chemistry of......................		535, 540-547
Rh–Rh bond distances in ..		471-485, 494-500,
		506-508, 515-519,
521-523, 527, 530, 594, 601
(S,N), (S,O) and (S,S) anionic
bridging ligands in ...............		468, 521-524
triazenate ligands in ...........................		512-513

unsupported Rh–Rh bonds in ............		528-533
Rh23+ compounds....................	535-536, 542, 544
rhodium blues ........................................		536-539
rhodium, mixed-valence molecular
wires containing .............................	536-537, 539
Ru26+ compounds
amidinate ligands in...........................		418-421
anionic N,N bridging ligands in		........416-422
electronic structures of .......................		415-422
guanidinate ligands in........................		421-422
macrocyclic ligands in ...............................		422
magnetic properties of........	415-416, 421-422
polyoxoanion bridges in .....................		415-416
redox chemistry of..............................		418-422
Ru–C bonds in...................................		417-421
Ru–Ru bond distances in ...................		414-415
Ru25+ compounds
amidate ligands in..............................		391-393
amidinate ligands in...........................		399-401
anionic N,N bridging ligands in		........396-404
biological significance of ....................		423-424
carbonate ligands in ...........................		390-391
carboxylate ligands in................	382-389, 394,
	398-404, 423-424
catalytic activity of.............................		422-423
cleavage of Ru–Ru bond in	.......................	385
electronic structures of ...............		386-389, 404
macrocyclic ligands in ...............................		422
magnetic properties of...............	388-389, 393,
395-396, 399, 401, 403-404
naphthyridine ligands in ....................		401-402
2-oxopyridinate ligands in..................		393-396
polyoxoanion bridges in ............................		390
redox chemistry of.....................	386, 392-393,
	395, 398, 400, 403
Ru–C bonds in...................................		397-401
Ru–Ru bond distances in ...................		378-382
Ru24+ compounds
amidinate ligands in...........................		411-412
carboxylate ligands in.........	405-409, 422-423
catalytic activity of.............................		422-423
cleavage of Ru–Ru bond in	................	406-407
electronic structures of .......	406-408, 410-414
macrocyclic ligands in ...............................		422
magnetic properties of........	407-411, 413-414
naphthyridine ligands in ....................		413-414
2-oxopyridinate ligands in..................		409-410
redox chemistry of......................		407, 411-414
Ru–Ru bond distances in ...................		404-405