Abstract
Mononuclear ruthenium–thiolate complexes of structural type CpRu(PPh 3) 2SR ( 1) [R = 2-imidazolyl ( a), 1-methylimidazolyl ( b), 5-methyl-1,3,5-thiadiazolyl ( c) and 5-methyl-4H-1,2,4-triazolyl ( d)] are accessible from the reaction of CpRu(PPh 3) 2Cl with the corresponding thiolate anions. Reaction of CpRu(PPh 3) 2Cl with the heterocyclic-thiolate anions in the presence of the bisphosphine ligands affords CpRu(P–P)SR [P–P = bis(diphenylphosphino)methane; dppm ( 2), bis(diphenylphosphino)ethane; dppe ( 3)]. If CO gas was bubbled through a THF solution of 1b, the complex CpRu(PPh 3)(CO)S(C 4N 2H 5) ( 4b) is produced. These ruthenium–heterocyclic thiolate complexes have been characterized by elemental analysis, spectroscopy (IR, 1H, 31P{ 1H} NMR and MS) and cyclic voltammetry for some samples. The solid-state structures of 3a and 3b are determined by single-crystal X-ray structure analysis.
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