Small cobaltacarborane clusters in synthesis. Peralkylation, perhalogenation, and macrocycle construction
作者:Haijun Yao、Russell N Grimes
DOI:10.1016/s0022-328x(03)00164-5
日期:2003.8
Methods are described for achieving stepwise replacement of all BH terminal hydrogens in CoC2B4 clusters with halogen or alkyl groups, leading to complexes such as Cp*Co(2,3-Et2C2B4X4) (X = Me or 1) and Cp*Co(2,3-Et2C2B4IMe2[O3SCF3]). Building on earlier work on B-functionalization of small metallacarboranes via metal-catalyzed cross-coupling, two- and three-dimensional macrocycles containing four to six metal centers have been constructed systematically from monomeric precursor complexes. (C) 2003 Elsevier Science B.V. All rights reserved.