On the synthesis and structures of the complexes [RuCl(L)(dppb)(N-N)] PF_6 (L = CO, py or 4-NH_2py; dppb - 1,4- bis(diphenylphosphino)butane; N-N - 2,2′-bipyridine or 1,10-phenanthroline) and [(dppb)(CO)Cl_2-Ru-pz-RuCl _2(CO)(dppb)] (pz - Pyrazine)

摘要

The "Ru(P-P)" unit (P-P-diphosphine) is recognized to be an important core in catalytic species for hydrogenation of unsaturated organic substrates. Thus, in this study we synthesized six new complexes containing this core, including the binuclear complex [(dppb)(CO)Cl_2Ru-pz-RuCl _2(CO)(dppb)] (pz - pyrazine) which can be used as a precursor for the synthesis of cationic carbonyl species of general formula [RuCl(CO)(dppb)(N-N)] PF_6 (N-N-diimine). Complexes with the formula [RuCl(py)(dppb)(N-N)] PF_6 were synthesized by exhaustive electrolysis of these carbonyl compounds or from the precursors [RuCl_2(dppb)(N-N)]. The new complexes were characterized by microanalysis, conductivity measurements, IR and ~(31)P{~1H} NMR spectroscopy, cyclic voltammetry and X-ray crystallography.