Sd. Orth et al., SYNTHESIS AND ELECTROCHEMISTRY OF HETEROBIMETALLIC RUTHENIUM PLATINUMAND MOLYBDENUM/PLATINUM COMPLEXES/, Inorganic chemistry, 35(4), 1996, pp. 916-922
As starting materials for heterobimetallic complexes, [RuCp(PPh(3))CO(
PPh(2)H)]PF6 and [RuCp(PPh(3))CO(eta(1)-dppm)]PF6 were prepared from R
uCp(PPh(3))(CO)Cl. In the course of preparing [RuCp(eta(2)-dppm)(eta(1
)-dppm)]Cl from RuCp(Ph(3)P)(eta(1)-dppm)Cl, the new monomer RuCpCl(et
a(1)-dppm)(2) was isolated. The uncommon coordination mode of the two
monodentate bis(phosphines) was confirmed by X-ray crystallography [a
= 11.490(1) Angstrom, b = 14.869(2) Angstrom, c = 15.447(2) Angstrom,
alpha = 84.63(1)degrees, beta = 70.55(1)degrees, gamma = 72.92(1)degre
es, V = 2378.7(5) Angstrom(3), d(calc) = 1.355 g cm(-3) (298 K), tricl
inic, P (1) over bar, Z = 2]. The dppm-bridged bimetallic complexes Ru
Cp(PPh(3))Cl(mu-dppm)PtCl2, RuCpCl(mu-dppm)(2)PtCl2, and [RuCp(PPh(3))
CO(mu-dppm)PtCl2]PF6 each exhibit electrochemistry consistent with var
ying degrees of metal-metal interaction. The cationic heterobimetallic
complexes [Mo(CO)3(mu-dppm)(2)Pt(H)]PF6 and [MoCp(Co)(2)(mu-PPh(2))(m
u-H)Pt(PPh(3))(MeCN)]PF6 were prepared by chloride abstraction from th
e corresponding neutral bimetallic species and show electrochemical be
havior similar to the analogous Ru/Pt complexes.