PREPARATION AND PROPERTIES OF NEW TRIPLY-BRIDGED DI-μ-PYRAZOLATE (μ-CARBONYL)DIRHODIUM COMPLEXES WITH PENTAMETHYLCYCLOPENTADIENYL AND DIPHOSPHINE LIGANDS

Article abstract of DOI:10.1016/0022-328X(86)80107-3

Cationic complexes of formula <(C5Me5)Rh(μ-pz)2(μ-CO)Rh(L-L)>BPh4 were prepared by treating a methanolic suspension of <(C5Me5)ClRh(μ-pz)2Rh(CO)2> with NaBPh4 in the presence of the didentate ligands L-L (L-L = bis(diphenylphosphino)methane(dppm), 1,4-bis(diphenylphosphino)butane (dppb), cis-1,2-bis(diphenylphosphino)ethylene (dppen), 1,2-bis(diphenylarsino)ethane (dpae)).The intermediate complex <(C5Me5)Rh(μ-pz)2(μ-CO)Rh(CO)(dppen)>BPh4 was isolated.The formation of the related compounds <(C5Me5)Rh(μ-pz)2(μ-CO)Rh(CO)L>BPh4 (L = PPh3, PCy3) is also reported.