title: Di-mu-chloro-1:2kappa2Cl;3:4kappa2Cl-hexachloro-1kappa3Cl,4kappa3Cl-tetra-mu-dimethylglycine-2:3kappa8O:O'-tetracopper(II).
abstract: The title compound, [Cu(NO3)2(C6H10N4)2], crystallizes in the centrosymmetric space group P21/c with a unit cell containing two tetranuclear copper(II) complexes sited on crystallographic inversion centres. The coordination geometry around the central Cu atoms is square pyramidal, with four O atoms in the basal plane and a Cl atom in the apical position. The lateral CuCl4 groups are flattened tetrahedral. The bridging dimethylglycine molecules are present in the dipolar zwitterionic form. The tetranuclear copper complexes exist as isolated entities since only intramolecular hydrogen bonds are found.
authors.affiliation: CEMDRX, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, P-3004-516 Coimbra, Portugal. manuela@pollux.fis.uc.pt
authors.forename: M
authors.initials: M
authors.lastname: Ramos Silva
authors.forename: A
authors.initials: A
authors.lastname: Matos Beja
authors.forename: J A
authors.initials: JA
authors.lastname: Paixão
authors.forename: J
authors.initials: J
authors.lastname: Martin-Gil