名称:
Synthesis, structure and spectroelectrochemistry of bis(η6-1,4-tri-tert-butyl-benzene)chromium(0) and bis(η5-1,2,4-tri-tert-butyl-cyclopentadienyl)cobalt(II). Dia- and paramagnetic sandwich complexes derived from sterically highly demanding π-ligands
摘要:
Metal atom synthesis gives access to the bis(arene)chromium sandwich of 1,4 di-tert-butyl-benzene (5). 5 displays an axial sandwich structure with a linear arene-chromium-arene axis and a Cr-arene distance of 1.64 Angstrom. Reduction of [{(eta(5)-1,2,4 tri-tert-butyl-Cp)CoCl}(2)] with the trianion of decacyclene in THF produces the cobaltocene sandwich [(eta(5)-1,2,4 tri-tert-butyl Cp)(2)Co] 2 as black crystals in 65% yield. Electrochemistry shows that the monocations 2(+) and 5(+) are able to support reversibly the one-electron reduction to their corresponding neutral congeners. (C) 1999 Elsevier Science S.A. All rights reserved.
DOI:
10.1016/s0022-328x(99)00383-6