Synthesis and structural characterisation of an isomorphous series of bis(imidazolin-2-imine) metal dichlorides containing the first row transition metals Mn, Fe, Co, Ni, Cu and Zn

摘要

The bis(imidazolin-2-imine) ligand N,N'-bis(1,3-diisopropyl-4,5- dimethylimidazolin-2-ylidene)-1,2-ethanediamine (BL~(iPr)) was used to synthesize a complete series of transition metal dichloride complexes of the type [(BL~(iPr))MCl_2] with M = Mn, Fe, Co, Ni, Cu, Zn. The molecular structure of each complex was established by X-ray diffraction analysis; the complexes are isomorphous and crystallize in the monoclinic space group C2/c, which allows comparison of their structural parameters in a constant packing environment. The complexes exhibit distorted tetrahedral coordination around the metal atoms with the dihedral angles between the MN_2 and MCl_2 planes ranging from 53.9° (M = Cu) to 75.5° (M = Zn).