title: Supramolecular interactions in a copper(II) 4'-(4-bromophenyl)-2,2':6',2''-terpyridine complex.
abstract: The title compound, [4'-(4-bromophenyl)-2,2':6',2''-terpyridine]chlorido(trifluoromethanesulfonato)copper(II), [Cu(CF(3)O(3)S)Cl(C(21)H(14)BrN(3))], is a new copper complex containing a polypyridyl-based ligand. The Cu(II) centre is five-coordinated in a square-pyramidal manner by one substituted 2,2':6',2''-terpyridine ligand, one chloride ligand and a coordinated trifluoromethanesulfonate anion. The Cu-N bond lengths differ by 0.1 Å for the peripheral and central pyridine rings [2.032 (2) (mean) and 1.9345 (15) Å, respectively]. The presence of the trifluoromethanesulfonate anion coordinated to the metal centre allows Br···F halogen-halogen interactions, giving rise to the formation of a dimer about an inversion centre. This work also demonstrates that the rigidity of the ligand allows the formation of other types of nonclassical interactions (C-H···Cl and C-H···O), yielding a three-dimensional network.
authors.affiliation: Département de Chimie, Université de Montréal, CP 6128, Succ. Centre-ville, Montréal, Québec, Canada H3C 3J7.
authors.forename: Ludwig
authors.initials: L
authors.lastname: Chenneberg
authors.forename: Janaina G
authors.initials: JG
authors.lastname: Ferreira
authors.forename: Garry S
authors.initials: GS
authors.lastname: Hanan