A Chloro-Bridged Dimanganese Complex and an Oxo-Bridged Dititanium Complex of a Ditopic Bis(pyrazol-1-yl)borate Ligand

The synthesis and crystal structure analysis of the ditopic p-phenylene-bridged bis(pyrazol-1-yl)borate [[p-C6H4(Bpz2tBu)2]Li2] (LLi2; pz = pyrazol-1-yl) is described. A salt metathesis reaction between LLi2 and MnCl2 in
THF leads to the dinuclear complex [L[Mn(THF)]2(μ-Cl)2] featuring a central diamond MnII−(μ-Cl)2−MnII core
(X-ray crystal structure analysis). Treatment of LLi2 with 2 equiv of [Ti(NMe2)3Cl] gives the dinuclear titanium compound [L[Ti(NMe2)3]2]. Upon reaction of LLi2 with [Ti(NMe2)2Cl2] and water, the μ-oxo-bridged dititanium species
[L[Ti(NMe2)Cl]2(μ-O)] is obtained in excellent yield (X-ray crystal structure analysis).