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A new dinuclear Ni(II) complex, [{Ni(L)(C 5 H 5 N)} 2 ], has been synthesized with 4-chloro-4′,6′-dibromo-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol (H 2 L), and characterized by elemental analyses, FT-IR, UV/Vis, molar conductance and X-ray crystallographic analysis. Each Ni(II) atom is located at a N 2 O 2  coordination site of a completely deprotonated (L) 2−  unit. Two  μ -phenoxo oxygen atoms from two [Ni(L)] units and two pyridine nitrogen atoms coordinate with two Ni(II) atoms. The two hexa-coordinated Ni(II) atoms have slightly distorted octahedral geometries. The  μ -phenoxo bridges play important roles in assembling Ni 2+  and (L) 2−  units. This 2:2 (Ni 2+ :(L) 2− ) structure is different from that of other Salamo-type Ni(II) complexes reported earlier.

A dinuclear nickel(II) complex derived from an asymmetric Salamo-type N 2 O 2 chelate ligand: synthesis, structure and optical properties