Di-μ-bromido-bis[bromido(4,7-diphenyl-1,10-phenanthroline-κ²N,N′)cadmium]

Abstract

The title compound, [Cd2Br4(C24H16N2)2], consists of a centrosymmetric dimeric unit in which two Br atoms bridge two CdII atoms, forming a four-membered ring. A terminal Br atom and a bidentate chelating 4,7-diphenyl-1,10-phenanthroline ligand complete a square-pyramidal geometry for the CdII atom. In the crystal, C—H⋯Br hydrogen bonds and π–π contacts between the pyridine and phenyl rings [centroid–centroid distances = 3.704 (4) and 3.715 (4) Å] lead to a three-dimensional supra­molecular structure.

Influence of benzannulation on metal coordination geometries: Synthesis and structural characterization of tris(2-mercapto-1-methylbenzimidazolyl)hydroborato cadmium bromide, {[TmMeBenz]Cd(μ-Br)}2

“…Furthermore, there are only six structurally characterized complexes listed in the CSD that feature any metal in a [ S 3 Br 2 ] environment, 17 while there are only nine examples of dimeric cadmium complexes that feature 5-coordinate cadmium with two μ–Br bridges. 18 The direct comparison of the molecular structures of {[Tm MeBenz ]Cd(μ–Br)} 2 and [Tm Me ]CdBr, therefore, makes it evident that benzannulation of a tris (2-mercaptoimidazolyl)hydroborato ligand can have a notable impact on the coordination chemistry of cadmium.…”