title: Four-coordinate Co(II) and Fe(II) complexes with bis(N-heterocyclic carbene)borate and their magnetic properties.
abstract: Both square planar and tetrahedral isomers of the four-coordinate complex [Co(Bc(tBu))2] with a bis(3-tert-butylimidazol-2-ylidene)borate ligand (Bc(tBu)) have been isolated while only a tetrahedral configuration was found for the Fe(ii) analogue [Fe(Bc(tBu))2]. Novel co-crystals containing both isomers of [Co(Bc(tBu))2] have been obtained from recrystallization.
authors.affiliation: State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China. xtchen@netra.nju.edu.cn.
authors.forename: Yuan-Zhong
authors.initials: YZ
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhao
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Xue-Tai
authors.initials: XT
authors.lastname: Chen
authors.forename: Zi-Ling
authors.initials: ZL
authors.lastname: Xue