Mononuclear tungsten(VI) complexes with methylenebis(6-alkylphenol)s
摘要:
Reaction of monomeric tungsten(VI) complex [W(eg)(3)] (1) (eg = 1,2-ethanediolate dianion) with either one or 2 equiv. of 2,2'-methylenebis(6-alkylphenol) [alkyl = Me (H2L1), Pr-i (H2L2), Bu-t (H2L3)] provides heteroleptic complexes [W(eg)(2)(L-n)] (2) and [W(eg)(L-n)(2)] (3), respectively. Sterically hindered ligand precursor H2L3, which bear bulky tert-butyl groups in ortho-positions, can form only a complex corresponding to formula 2. (C) 2003 Elsevier Ltd. All rights reserved.