Bridging versus chelating diphosphine in clusters: Isomers of Os3(CO)10(diphosphine)
作者:Antony J. Deeming、Susan Donovan-Mtunzi、Shariff E. Kabir
DOI:10.1016/0022-328x(84)80667-1
日期:1984.11
Isomers of Os3(CO)10(diphosphine) (diphosphine = Ph2P(CH2)nPPh2; n = 2 (dppe), n = 3 (dppp), and n = 4 (dppb)) have been prepared in which the diphosphine is chelating (1,1-isomer) or bridging (1,2-isomer), respectively, by displacing butadiene or acetonitrile from the complexes Os3(CO)10(cis- or trans-C4H6) or Os3(CO)10(MeCN)2. Ph2PCH2PPh2 (dppm) gives only the known bridging (1,2-isomer) whichever
Methylene chain length and coordination geometry in triosmium clusters containing diphosphine ligands X-ray crystal structures of [Os3(CO)10{μ-Ph2P(CH2)n}](n = 4 or 5) and [Os3(CO) 8{μ-Ph2PCH2PPh2}2]
作者:Shariff E. Kabir、Arzu Miah、Lutfun Nesa、Khabir Uddin、Kenneth I. Hardcastle、Edward Rosenberg、Antony J. Deeming
DOI:10.1016/0022-328x(94)05276-h
日期:1995.4
dppp)] (4) whereas [Os3(CO)10(μ-dppm)] under the same conditions reacts with dppm (dppm = Ph2PCH2PPh2) to give [Os3(CO)8(μ-dppm)2] (5). Protonation of 5 with trifluoroacetic acidgives [(μ-H)Os3(CO)8(μ-dppm)2]+ (6) with the hydride bridging the unsubstituted Os — Os edge. The monoacetonitrile compound [Os3(CO)11(MeCN)] reacts with dppp at 0°C to give two compounds: [Os3(CO)11(η1-dppp)] (7) containing