Telluride-substituted mixed metal clusters. Crystal structures of [HRuCo3(CO)11(TeMe2)], [HRuCo3(CO)10(TeMe2)2], and [HRuCo3(CO)11(TePh2)

Abstract

Abstract The synthesis, structures and characterization of dimethyltelluride and diphenyltelluride derivatives of mixed metal clusters [HRuCo 3 (CO) 12 ] and [HRuRh 3 (CO) 12 ] are described. Telluride ligands displace carbonyl ligands in neutral parent clusters to give [HRuCo 3 (CO) 11 (TeMe 2 )] ( 1 ), [HRuCo 3 (CO) 10 (TeMe 2 ) 2 ] ( 2 ), [HRuCo 3 (CO) 11 (TePh 2 )] ( 3 ) and [HRuRh 3 (CO) 9 ] 2 [TeMe 2 ] 3 ( 4 ). The crystal structures of 1 , 2 and 3 have been determined. The ligand substitutions are metalloselective. Dimethyltelluride displaces an apical carbonyl ligand at ruthenium in 1 ; in 2 an additional axial ligand at cobalt is replaced by telluride. Diphenyltelluride coordinates axially at cobalt in 3 . Compound 4 has a dimeric structure in which the axial carbonyls at rhodium centers have been replaced by TeMe 2 ligands. In all four compounds the basic cluster arrangement is retained and the cluster hydride caps the basal metal face.