Affordable Access

Publisher Website

Oxidative-addition reactions of M(CO)4(NN) (M = Mo or W) using iodobenzene dichloride. Isolation of seven-coordinate cations of molybdenum(II) and tungsten(II) containing alkyl isocyanide and bidentate N-heterocycle ligands

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
263
Issue
3
Identifiers
DOI: 10.1016/0022-328x(84)85038-x

Abstract

Abstract A series of seven-coordinate tungsten(II) salts [W(CNR) 5(NN)](PF 6) 2 (R = CHMe 2, CMe 3, C 6H 11, or CH 2Ph; NN = bipy, Me 2bipy, or phen) have been prepared in high yield (75%). The synthetic procedure involves the oxidation of the metal carbonyl derivative W(CO) 4(NN) with iodobenzene dichloride, followed by displacement of carbon monoxide and chloride ligands from the intermediate W(CO) 3(NN)Cl 2 by alkyl isocyanide. These reactions work equally well for the conversion of Mo(CO) 4(NN) to [Mo(CNR) 5(NN)](PF 6) 2. The dealkylation of [W(CNCMe 3) 5(NN)](PF 6) 2 to give [{W(CNCMe 3) 4(NN)} 2(μ-CN)](PF 6) 3 occurs in refluxing ethanol. The direct reaction of [W(CNCMe 3) 7](PF 6) 2 with NN in refluxing 1-propanol leads to the dealkylation product [W(CNCMe 3) 6(CN)]PF 6, but there is no evidence for the substitution of the Me 3CNC ligands by NN via such a route.

There are no comments yet on this publication. Be the first to share your thoughts.