178757-27-2Relevant articles and documents
Pentamethylcyclopentadienyliridium(III) complexes containing tertiary phosphorus chalcogenide ligands: Crystal structure of [(η5C5Me5)Ir{PO(OMe)2}{η2(SPPh2)2CH2-S,S′}]BF4 · 0.5Me2CO
Valderrama, Mauricio,Contreras, Raul
, p. 7 - 15 (2007/10/03)
Neutral iridium(III) complexes of the unidentate P-donor ligands dppm, dppmS and dppmSe, and cationic complexes with these ligands acting in their bidentate form have been prepared and characterized. Similar cationic complexes with the symmetrical bidentate dichalcogenide ligands dppmS2 and dppmSe2 have been described. These compounds react with sodium hydride in tetrahydrofuran or with thallium pyrazolate in dichloromethane to yield the new cationic complexes [(η5C5Me5)Ir{η3(EPPh2)2CH-C,E,E′}]+ (E = S, Se) in which the anionic methanide dichalcogenide ligand is acting as a tripod ligand with a C,E,E′-donor set. However, the complexes [(η5C5Me5)IrCl(η2dppmE2)]BF4 react with P(OMe)3 in the presence of TIBF4, to give the dicationic compounds [(η5C5Me5)Ir{P(OMe)3}(η2dppmE2)](BF4)2. In these complexes, the P(OMe)3 ligand is transformed into a coordinated PO(OMe)2 group by reaction with sodium iodide in acetone. The structure of the complex [(η5C5Me5)Ir{PO(OMe)2}(η2dppmS2-S,S′)]BF4 · 0.5Me2CO have been determined by single crystal X-ray diffraction methods.