Secondary bonding in a six-coordinate Mn(II) complex as a model of associative substitution
作者:Clyde W. Cady、Christopher Incarvito、Gary W. Brudvig、Robert H. Crabtree
DOI:10.1016/j.ica.2006.02.005
日期:2006.5
The new hexadentate, bis-pincer ligand, (dipyCH(2))MeNCH2CH2NMe(CH(2)dipy) (dipy = 2,2'-dipyridyl-6-yl) forms a crystallographically characterized Mn(II) complex in which each half of the ligand binds a separate Mn(OAc)(2) unit. The structure consists of a distorted N3Mn(eta(2)-OAc)(eta(1)-OAc) core with six normal coordinate bonds and a long (2.85 angstrom) secondary bond to a seventh ligand atom, an oxygen of the ill-acetate. In addition to demonstrating an interesting coordination mode, the structure also mimics a predicted transition state in the associative ligand exchange of octahedral Mn(II) complexes. (c) 2006 Elsevier B.V. All rights reserved.