Phosphine complexes osmium

Within the osmium complexes in oxidation states (II-IV) [11,12] the stability of the +4 oxidation state becomes more important. Ammine and tertiary phosphine complexes have been selected for detailed examination. 

Figure 1.60 Syntheses of some osmium complexes of tertiary phosphines.

Considerable structural information is available on osmium complexes of tertiary phosphines, arsines and stibines (Table 1.13) [152, 157]. 

Considerable structural information is available on osmium complexes of tertiary phosphines, arsines and stibines (Table 1.13) [152, 157], Comparison with data (mainly obtained from EXAFS measurements) on osmium diarsine complexes (Table 1.14) shows that as the oxidation state increases, osmium-halogen bonds shorten whereas Os-P and Os-As bonds lengthen. Bond shortening is predicted for bonds with ionic character,... 

Phosphine complexes, osmium, 19 642 Phosphine coordination complexes, of uranium, 25 436 Phosphine derivatives, 19 28 Phosphine oxide(s), 11 495-496 19 66 predicted deviations from Raoult s law based on hydrogen-bonding interactions, 8 814t in salicylic acid manufacture, 22 8 Phosphine oxide diols/triols, 11 501 Phosphine selenides, 22 90 Phosphinic acid, 19 20, 54-55 Phosphinic anhydride, 11 499 Phosphinothricin acetyltransferase (PAT) proteins, 13 360 Phosphite esters, 19 20 Phosphites, in VDC polymer stabilization, 25 720... 

Ruthenium(IV) and osmium(IV) phosphoraniminato complexes are formed by nucleophilic attack of phosphines on the nitrido ligand of ruthenium(VI) or osmium(VI). The first examples of this type of complexes are [Os (NPR3)(PR3)2(Cl)3] and [Ru (NPEt2Ph)(Cl)3(PEt2Ph)2], which have been documented in CCC (1987). While there are quite a few osmium complexes of this class, there appears to be only one structurally characterized ruthenium complex. 

Organometallic reagents and catalysts continue to be of considerable importance, as illustrated in several procedures CAR-BENE GENERATION BY a-ELIMINATION WITH LITHIUM 2,2,6,6-TETRAMETHYLPIPERIDIDE l-ETHOXY-2-p-TOL-YLCYCLOPROPANE CATALYTIC OSMIUM TETROXIDE OXIDATION OF OLEFINS PREPARATION OF cis-1,2-CYCLOHEXANEDIOL COPPER CATALYZED ARYLA-TION OF /3-DICARBONYL COMPOUNDS 2-(l-ACETYL-2-OXOPROPYL)BENZOIC ACID and PHOSPHINE-NICKEL COMPLEX CATALYZED CROSS-COUPLING OF GRIG-NARD REAGENTS WITH ARYL AND ALKENYL HALIDES 1,2-DIBUTYLBENZENE. 

CsHuN, Ethanamine, A-ethyl-A-methyl-tungsten complex, 26 40, 42 C6HF5, Benzene, pentafluoro-gold complexes, 26 86-90 C H4I2, Benzene, 1,2-diido-iridium complex, 26 125 CJT, Phenyl platinum complex, 26 136 C,H,N, Pyridine osmium complex, 26 291 OHtS, Benzenethiol osmium complex, 26 304 QH7P, Phosphine, phenyl-cobalt-iron complex, 26 353 QH 1-Butyne, 3,3-dimethyl-mercury-molybdenum-ruthenium complex, 26 329-335 C6H 4P, Phosphine, triethyl-platinum complex, 26 126 platinum complexes, 26 135-140 CsHisPO, Triethyl phosphite iron complex, 26 61... 

The highly toxic osmium complex Os3(CO)8(M-Cl)2PPh3 was immobilized via an anchored phosphine ligand as Os3(CO)8(/x-Cl)2Ph2P-[Res]. The bonding may be more complex, for example, Kalck and coworkers have proposed that each rhodium atom of the dinuclear carbonyl is anchored to the resin (equation 9) ... 

B2(cal)2 adds readily to the ruthenium zero oxidation state compounds, Ru(CO)L(PPh3)3 (L = CO, CN-p-tolyl), to give six coordinate bis(boryl)-complexes in which both the two phosphine ligands, and the two boryl ligands, arc mutually cix (see Scheme 2).6 This reaction is not general since the corresponding osmium complexes do not react directly with B2(cat)2, however, bis(boryl)-osmium... 

CF3H, Methane, trifluoro-cadmium complex, 24 55 mercury complex, 24 52 CF3NOS, Imidosulfurous difluoride, (fluorocarbonyl)-, 24 10 CH2, Methylene ruthenium complex, 25 182 CH2CI4P2, Phosphine, methylenebis-(dichloro)-, 25 121 CH3, Methyl cobalt complexes, 23 170 mercury complexes, 24 143-145 platinum complex, 25 104, lOS CNO, Cyanato silicon complex, 24 99 CN2OS2, l,3k, 2,4-Dithiadiazol-5-one, 25 53 CO, Carbon monoxide chromium complexes, 21 1, 2 23 87 cobalt complex, 25 177 cobalt, iron, osmium, and ruthenium complexes, 21 58-65 cobalt-osmium complexes 25 195-197 cobalt-ruthenium cluster complexes, 25 164... 

QH P, Phosphine, triethyl-, gold-osmium complexes, 27 209, 211 gold-platinum complex, 27 218 platinum complexes, 26 126, 135-140, 27 32, 34... 

QH P, Phosphine, dimethylphenyl-, iron complex, 26 61 molybdenum complex, 27 11 osmium complex, 27 27 osmium-rhodium complex, 27 29 osmium-zirconium complex, 27 27 ruthenium complex, 26 273 CkH,2, 1,5-Cyclooctadiene, iridium complex, 26 122, 27 23 osmium-rhodium complex, 27 29 ruthenium complexes, 26 69-72, 253-256 CbH 20,PS, 2-Butenedioic acid, 2-(dimeth-ylphosphinothioyl)-, dimethyl ester, manganese complex, 26 163 ChH,4, Cyclooctene, platinum complex,... 

C H P, Phosphine, triphenyl-, cobalt complex, 26 190-197 cobalt-gold-iron complex, 27 188 coball-gold-ruthenium complex, 26 327 gold complex, 26 90, 325, 326, 27 214 gold and manganese complex, 26 229 gold-osmium complexes, 27 209, 211 gold and platinum complex, 27 218 iridium complexes, 26 117-120, 122-125, 201.202... 

Non-chromophoric ligand variations have been carried out in the series of osmium complexes [Os(phen)L ](L-pyridine, MeCN, phosphine, arsine) and emission energies, excited-state redox potentials, and radiative and non-radiative rate const2uits found to vary systematically with the potential of the ground-state Os(III/II) couple.Phosphorescence from [Os(TTP)(CO)MeOH] au d [Os(TTP)(CO)pytIdlne] is quenched by electron donors auid acceptors by a reversible electron transfer mechauiism. 

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