title: catena-poly[[tetrakis(2-allyltetrazole-kappaN4)-tetra-mu-chloro-tricopper(II)]-di-mu-chloro].
abstract: In the crystal structure of the title compound, [Cu(3)Cl(6)(C(4)H(6)N(4))(4)](n), there are three Cu atoms, six Cl atoms and four 2-allyltetrazole ligands in the asymmetric unit. The polyhedron of one Cu atom adopts a flattened octahedral geometry, with two 2-allyltetrazole ligands in the axial positions [Cu-N4 = 1.990 (2) and 1.991 (2) A] and four Cl atoms in the equatorial positions [Cu-Cl = 2.4331 (9)-2.5426 (9) A]. The polyhedra of the other two Cu atoms have a square-pyramidal geometry, with three basal sites occupied by Cl atoms [Cu-Cl = 2.2487 (9)-2.3163 (8) and 2.2569 (9)-2.3034 (9) A] and one basal site occupied by a 2-allyltetrazole ligand [Cu-N4 = 2.028 (2) and 2.013 (2) A]. A Cl atom lies in the apical position of either pyramid [Cu-Cl = 2.8360 (10) and 2.8046 (9) A]. The possibility of including the tetrazole N3 atoms in the coordination sphere of the two Cu atoms is discussed. Neighbouring copper polyhedra share their edges with Cl atoms to form one-dimensional polymeric chains running along the a axis.
authors.affiliation: Physico-Chemical Research Institute, Belarusian State University, Leningradskaya Str. 14, Minsk 220050, Belarus. iva@bsu.by
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Lyakhov
authors.forename: Pavel N
authors.initials: PN
authors.lastname: Gaponik
authors.forename: Michail M
authors.initials: MM
authors.lastname: Degtyarik
authors.forename: Vadim E
authors.initials: VE
authors.lastname: Matulis
authors.forename: Vitaly E
authors.initials: VE
authors.lastname: Matulis
authors.forename: Ludmila S
authors.initials: LS
authors.lastname: Ivashkevich