Preparation and crystal structure of bis(triethylene glycol-O,O′,O′’,O‴)manganese(II) dibromide

Abstract

A new complex, bis(triethylene glycol-O,O′,O′’,O‴)manganese(II) dibromide [Mn(TEG)2]2+·2Br−, was prepared. Its structure was studied by single crystal X-ray diffraction. The complex cation [Mn(TEG)2]2+ is of the host-guest type with two TEG ligands (podands) as hosts. Both TEG ligands are disordered and tetradentate, with all the four oxygen atoms of each ligand participating in the coordination. The Mn2+ cation has coordination number 8, and its coordination polyhedron is a distorted bisdisphenoid (trigonal dodecahedron). The geometric parameters (bond lengths, bond and torsion angles) of the complex were determined relatively accurately. In the crystal structure, the ions form infinite thick layers by interionic hydrogen bonds O-H···Br−.