Seven-coordinate and Alkyne Complexes of Tungsten(II) containing both Chloride and Iodide Ligands. Crystal Structure of [WCl(CO)(2,2′-bipy)(η2-MeC2Me)2]I

Abstract

Reaction of [WClI(CO)(NCMe)(η²-MeC₂Me)₂] with an equimolar amount of 2,2′-bipy gives the crystallographically characterised iodide displaced product [WCl(CO)(2,2′-bipy)(η²-MeC₂Me)₂]I, which proves definitively that iodide is displaced in preference to chloride for the first time in these mixed halide complexes.