title: [(1,4,8,11-Tetraazacyclotetradeca-1,4,8,11-tetrayl)tetraacetamide-kappa6N1,N4,N8,N11,O1,O8]copper(II) sulfate 4.5-hydrate.
abstract: The crystal structure of the title copper(II) complex, [Cu(C(18)H(36)N(8)O(4))]SO(4).4.5H(2)O, formed with the tetraamide cyclam derivative 2-(4,8,11-triscarbamoylmethyl-1,4,8,11-tetraazacyclotetradec-1-yl)acetamide (TETAM), is described. The macrocycle lies on an inversion centre occupied by the hexacoordinated Cu atom. The four macrocyclic tertiary amines form the equatorial plane of an axially Jahn-Teller elongated octahedron. Two O atoms belonging to two diagonally opposite amide groups occupy the apical positions, giving rise to a trans-III stereochemistry, while both the remaining pendant side arms extend outwards from the macrocyclic cavity and are engaged in hydrogen bonds with sulfate anions and co-crystallized water molecules.
authors.affiliation: LIMSAG, UMR 5633 du CNRS, Université de Bourgogne, Faculté des Sciences, 6 boulevard Gabriel, 21100 Dijon, France.
authors.forename: Enrique
authors.initials: E
authors.lastname: Espinosa
authors.forename: Michel
authors.initials: M
authors.lastname: Meyer
authors.forename: David
authors.initials: D
authors.lastname: Berard
authors.forename: Roger
authors.initials: R
authors.lastname: Guilard