Synthetic and structural studies on organotransition metal-indium thiocyanate complexes

Abstract

The reaction between In(NCS) 3 and two equivalents of Na[Mo(CO) 3(η-C 5H 5)] afforded the indium thiocyanate complex [In(NCS){Mo(CO) 3(η-C 5H 5)} 2] ( 2). The complexes [In(NCS){Fe(CO) 2(η-C 5H 5)} 2] ( 3) and [In(NCS){W(CO) 3(η-C 5H 5)} 2] ( 4) were prepared similarly. The reaction between 2 and OPPh 3 afforded the complex [In(NCS)(OPPh 3) {Mo(CO) 3(η-C 5H 5)} 2] ( 5) and that between 3 and 4-picoline afforded [In(NCS)(4-picoline){Fe(CO) 2(η-C 5H 5)} 2] ( 6) both of which were characterized by X-ray crystallography. In 5 and 6, the indium centres are four-coordinate with a distorted tetrahedral coordination geometry and the thiocyanate groups are bonded through the nitrogen atom. The reaction between 2 and [K(18-crown-6)][SCN] affords the ionic complex [K(18-crown-6)] [In(NCS) 2{Mo(CO) 3(η-C 5H 5)} 2] ( 7) which has also been characterized by X-ray crystallography.