作者:Neil J. Brown、Mark A. Fox、Mark E. Smith、Dmitry S. Yufit、Judith A.K. Howard、Paul J. Low
DOI:10.1016/j.jorganchem.2009.08.027
日期:2009.12
Reactions of metal acetylide complexes M(C CAr)(PP)Cp' (M = Fe, Ru; Ar = C6H5, C6H4Me-4; PP = (PPh3)(2), dppe; Cp' = Cp, Cp*; not all combinations), or the analogous vinylidene, with cyanogen bromide yield monobromovinylidene complexes [MC=C(Br)Ar}(PP)Cp'](+), isolated as PF6 salts. The trimethylsilylcapped acetylides M(C CSiMe3)(PP)Cp' react with cyanogen bromide to give [M(C CBr2)(PP)Cp'](+), the first examples of metal complexes containing a terminal dihalovinylidene ligand, which can be isolated as the BF4 salts. Molecular structures of representative mono- and di-bromovinylidene complexes are reported, together with those of Ru(C CSiMe3)(PPh3)(2)Cp and Ru(C CSiMe3)(dppe)Cp*. (C) 2009 Elsevier B. V. All rights reserved.