The synthesis and reactions with neutral monodentate ligands of the seven-coordinate complex [MoCl(GeCl 3)(CO) 3(NCMe) 2

Abstract

The reaction of fac-[Mo(CO) 3(NCMe) 3] (prepared in situ) with an equimolar quantity of GeCl 4 rapidly affords the molybdenum(II) seven-coordinate complex [MoCl(GeCl 3)(CO) 3(NCMe) 2] ( 1) in quantitative yield. Equimolar quantities of 1 and L (L = PPh 3, AsPh 3 or SbPh 3) react in CH 2Cl 2 or NCME to give [MoCl(GeCl 3)(CO) 3(NCMe)L] or [MoCl(GeCl 3)(CO) 2(NCMe) 2L], respectively. The reactions of [MoCl(GeCl 3)(CO) 3(NCMe)(PPh 3)] and [MoCl(GeCl 3 (CO) 2(NCMe) 2(PPh3)] with a series of neutral and anionic donor ligands are described. Complex 1 reacts with two equivalents of L (L = PPh 3, AsPh 3, SbPh 3 or PPh 2Cy) in CH 2Cl 2 to afford [MoCl(GeCl 3)(CO) 2(NCMe)(PPh 3) 2] and [MoCl(GeCl 3)(CO) 3L 2]. Reactions of [MoCl](GeCl 3)(CO) 2(NCMe)(PPh 3) 2] are also discussed.