289487-35-0Relevant articles and documents
Dppm and hydrido-bridged dinuclear complexes of iridium. Synthesis and structures of [(IrCp*)2(u-dppm)(u-H)(u-X)]2+ (X = Cl, OMe, OH, or H)
Fujita, Ken-Ichi,Hamada, Taro,Yamaguchi, Ryohei
, p. 1931 - 1936 (2000)
Reaction of [IrCp*Cl(u-H)]21 (Cp* = pentamethylcyclopentadienyl) with two equivalents of bis(diphenylphosphino)methane (dppm) gave an unidentate dppm complex IrCp*(H)(Cl)(dppm-/)) 2. This reacted with a half equivalent of [IrCp*CI(u-CI)]2 3 to give a dppm-bridged dinuclear complex (Cl)(H)Cp*Ir(n-dppm)IrCp*Cl2 4, in which the two metal centers are distal. Reaction of 4 with two equivalents of AgOTf (OTf = O3SCF3) gave a dppm, hydride and chloride-bridged diiridium complex [(IrCp*)2(u-dppm)(u-H)(u-Cl)][OTf]2 5a. Complex 5a reacted with sodium methoxide in methanol to give [(IrCp*)2(u-dppm)(u-H)(u-OMe)][OTf]2 6a. This reacted with water in refiuxing acetone to give a diiridium complex [(IrCp*)2(u-dppm)(u-H)(n-OH)][OTf]2 7a. Heating complex 6a in refiuxing toluene gave [(IrCp*)2(u-dppm)(n-H)2][OTf]2 8a. The structures of the anion exchanged complexes [(IrCp*)2(u-dppm)(u-H)(u-X)][BPh4]2 [X = Cl 5b, OMe 6b, OH 7b or H 8b] have been confirmed by X-ray analysis. The Royal Society of Chemistry 2000.
