Bromido(1,4,7,10,13-pentaazacyclohexadecane)cobalt(III) dibromide dihydrate

Abstract

The title salt, [CoBr(C11H27N5)]Br2·2H2O, contains a complex cation with mirror symmetry and two Br− counter-anions that are likewise located on the mirror plane. The central CoIII atom of the complex cation has one Br− ion in an axial position, one N atom of the penta­dentate macrocyclic ligand in the other axial position and four N atoms of the ligand in equatorial positions, defining a distorted octa­hedral coordination geometry. The macrocyclic ligand is coordinated to the CoIII atom within a 5, 6, 5 arrangement of chelate rings in the equatorial plane of the four N atoms. Due to symmetry, the configuration of the chiral N atoms is 1RS, 4SR, 10RS, 13SR. In the crystal, N—H⋯Br, O—H⋯Br and N—H⋯O hydrogen bonds between the complex cation, anions and lattice water mol­ecules generate a three-dimensional network.

Arene-Perfluoroarene-Anion Stacking and Hydrogen Bonding Interactions in Imidazolium Salts for the Crystal Engineering of Polarity

“…The O···Br···O and Br···O···Br angles are 98.8(1), 94.6(2), 86.4(2) and 99.2(1)°, and 121.9(2), 124.4(2), 116.8(2) and 123.5(2)° respectively. Similar ribbons of bromide anions and water molecules are present in crystal structures of several other hydrated bromide salts. − …”