Abstract
The title compound, [Mg(C44H24Br4N4)(H2O)(2)]or [Mg(TBrPP)(H2O)(2)], where TBrPP is the 5,10,15,20-tetrakis(4-bromophenyl) porphyrinato ligand, was obtained unintentionally as a by-product of the reaction of the [Mg(TBrPP)] complex with an excess of dimethylglyoxime in dichloromethane. The entire molecule exhibits point group symmetry 4/m. In the asymmetric unit, except for two C atoms of the phenyl ring, all other atoms lie on special positions. The Mg II atom is situated at a site with symmetry 4/m, while the N and the C atoms of the porphyrin macrocycle, as well as two C atoms of the phenyl ring and the Br atom lie in the mirror plane containing the porphyrin core. The H atoms of the axially bonded water molecule are incompatible with the fourfold rotation axis and are disordered over two sites. In the crystal, molecules are packed in rows along [001]. Weak intermolecular C-H center dot center dot center dot pi and C-H center dot center dot center dot Br interactions, as well as O-H center dot center dot center dot Br hydrogen bonds, stabilize the crystal packing.