Synthesis of several functionalized cis-diisocyanide and fac-triisocyanide metal complexes

cis-Diisocyanide metal complexes of the types cis-W(CNR)(2)(CO)(4), cis-ReCl(CNR)(2)(CO)(3), and Fe(eta(5)-C5H5)Cl(CNR)(2) and fac-triisocyanide metal complexes of the types fac-W(CNR)(3)(CO)(3) and [Fe(eta(5)-C5H5)(CNR)(3)]Cl have been prepared. The isocyanides are of the type 4-CNC6H2-3,5-i-Pr-2-f, whereby the functionalities f are capable of forming strong coordinative bonds to transition metals (f = CCH, CC-4-C5H4N, or CC-4,4'-biphenyl-C6H2-3,5-i-Pr-2-4-NC) or capable of being interconnected with each other by covalent bond formation (f = Br, I, CCSiMe3, CCH). The molecular structures of cis-W(4-CN-3,5-i-Pr-2-C6H2CC-4-C5H4N)(2)(CO)(4), cis-ReCl(4-CN-3,5-i-Pr-2-C6H2CCH)(2)(CO)(3), and Fe(eta(5)-C5C5)Cl(4-CN-3,5-i-Pr-2-C5H4CC-4-C5H4N)(2) have been determined by X-ray crystallography. (C) 1999 Elsevier Science S.A. All rights reserved.