The Electronic Structure of (Diiminopyridine)cobalt(
<scp>I</scp>
) Complexes
作者:Quinten Knijnenburg、Dennis Hetterscheid、T. Martijn Kooistra、Peter H. M. Budzelaar
DOI:10.1002/ejic.200300569
日期:2004.3
square-planar (LCoR)-R-I complexes of a diiminopyridine ligand are best regarded as containing low-spin Co-II antiferromagnetically coupled to a ligand radical anion. The lowest triplet state, corresponding to a 3d(z)(2)-->pi* excitation, is calculated to be only a few kcal/mol above the ground state, and is thermally accessible. The anomalous H-1 NMR chemical shifts of the LCoR complexes are suggested to
DFT 计算表明,二亚氨基吡啶配体的方形平面 (LCoR)-RI 配合物最好被认为含有与配体自由基阴离子耦合的低自旋 Co-II 反铁磁性。最低三重态对应于 3d(z)(2)-->pi* 激发,经计算仅比基态高几 kcal/mol,并且是热可及的。LCoR 复合物的异常 H-1 NMR 化学位移被认为是由于室温下三重态的热群所致。(C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004。