Abstract
The complex cis-[Mo2(HDpyF)2(CH3CN)4](BF4)4, 1, was prepared by the reaction of Mo2(DpyF)4 with HBF4 in CH3CN, in which new bonding mode of the HDpyF ligand and axial N–H···Mo interactions are observed. Reaction of 1 with pyridine afforded the complex trans-[Mo2(DpyF)2(py)4](BF4)2, 2. In complex 1, the neutral bidentate HDpyF ligands bridge the metal centers through one of the amine nitrogen atoms and the adjacent pyridyl nitrogen atom, resulting in the s-trans-anti-s-trans conformation. The anionic DpyF− ligands of 2 adopt the s-trans,s-trans conformation and are coordinated to the Mo centers in bidentate fashions through the two central nitrogen atoms and the two terminal nitrogen atoms are not coordinated.
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