Seven-coordinate molybdenum-tin complexes containing phosphorodithioato and phosphoniodithioformate. X-Ray structure of [Mo(CO)2S2P(OEt)2(S2CPCy3)(SnPhCl2)] · CH2Cl2

Abstract Reactions of [Mo(CO) 3 (NCMe)(S 2 PX 2 )(SnRCl 2 )] ( 1 ) with an excess of S 2 CPR 3 afford complexes [Mo(CO) 2 (S 2 PX 2 )(S 2 CPR′3)-(SnRCl 2 )] ( 2 ; R = Ph or Bu; X = OEt or Ph; R′ = Cy or i Pr). An X-ray structure analysis of [Mo(CO) 2 S 2 P (OEt) 2 (S 2 CPCy 3 )-(SnPhCl 2 )] ( 3a ) showed that both sulphur ligands chelate molybdenum. Additionally, one sulphur atom of the S 2 CPR 3 group is within bonding distance of the tin atom, and thus bridges molybdenum and tin.