The reactions of [WI 2(CO)(NCMe)(η 2-RC 2R) 2] (R = Me OR Ph) with OPPh 3 and SPPh 3

Abstract

Equimolar quantities of [WI 2(CO)(NCMe)(η 2-RC 2R) 2] (R = Me or Ph) and L (L = OPPh 3 or SPPh 3) react in CH 2Cl 2 at room temperature to give [WI 2(CO)L(η 2-RC 2R) 2] ( 1)– 4). The reaction of [WI 2(CO)(NCMe)(η 2-RC 2R) 2] (R = Me or Ph) with 2 equivalents of L (L = OPPh 3 or SPPh 3) eventually affords the cationic complexes [WI(CO)L 2(η 2-RC 2R) 2]I ( 5– 8). The complexes [WI 2(CO)(NCMe)(η 2-RC 2R) 2] (R = Me or Ph) react with 3 equivalents of L (L = OPPh 3 or SPPh 3) to yield the dicationic complexes [W(CO)L 3(η 2-RC 2R) 2]2I ( 9– 12). The mono- and dicationic nature of 5– 8 and 9– 12 was established by preparing the tetraphenylborate complexes [WI(CO)(OPPh 3) 2(η 2-MeC 2Me) 2][BPh 4] ( 13) and [W(CO)(OPPh 3) 3(η 2-MeC 2Me) 2][BPh 4] 2 ( 14), respectively.