Divalent metal chloride amidine complexes - 2. Compounds of Mn, Co and Ni

Article abstract of DOI:10.1016/0277-5387(96)00206-9

A series of compounds of the type [MCl₂(amidine)₂]_n, M = Mn, Co and Ni, has been prepared in high purity and yield by solubilizing otherwise insoluble metal chlorides in the presence of neutral amidines in refluxing toluene. As crystalline solids, they are stable in air for several days. The compounds are excellent starting materials for the formation of dinuclear compounds. A complete chemical and structural characterization is provided for the penta-coordinated dimanganese compound [MnCl₂(HDPhF)₂]₂, I (DPhF = diphenylformamidinato), the mononuclear compounds CoCl₂(HDPhBz)₂, II (DPhBz = diphenylbenzamidinato), and NiCl₂(HDTolF)₂, III (DTolF = di-p-tolylformamidinato). The HDPhF analogue of III reacts with a strong base to give the dinuclear species Ni₂(DPhF)₄ (IV), the structure of which is also reported here. Copyright