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Synthese,Eigenschaften und Struktur von cis-Dihydridoazido-tris(triphenylphosphino)-iridium
Authors:Ingeborg Walker,Joachim Str  hle
Affiliation:Ingeborg Walker,Joachim Strähle
Abstract:Synthesis, Properties, and Structure of cis-Dihydrido Azido Tris(triphenylphosphino) Iridium cis-IrH2(N3)(PPh3)3 is formed from IrCl3(PPh3)3 and NaN3 in alcohol. The solvent transfers the hydride ions whereby aldehyde is formed. The creme-colored cis-IrH2(N3)(PPh3)3 is a diamagnetic low-spin complex. Exposure to light yields H2 and Ir(N3)(PPh3)3 in a reversible process. The cis position of the hydrido ligands is confirmed by the i.r. and H-N.M.R. spectra. Cis-IrH2(N3)(PPh3)3 crystallizes in the monoclinic system with the space group P21/c. The crystal structure exhibits isolated octahedral complexes, in which one hydrido ligand is located trans to the azido group. The other one being trans to one of the phosphine ligands.
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