Solid state coordination chemistry of the copper halide- and pseudo-halide-organoamine system, Cu-X-[(bis-2,3-(2-pyridyl)pyrazine)] (X = Cl, Br, CN): Hydrothermal synthesis and structural characterization

The compounds [Cu3Cl3(bipypy)] (1), [CuBr(bipypy)](2) (2), [Cu2Br2(bipypy)] (3), and [Cu-3(CN)(3)(bipypy)] (4) were prepared from mixtures of the copper halide salts and the ligand bis-2,3-(2-pyridyl)pyrazine (bipypy) in hydrothermal media. The series of compounds includes molecular, one- and two-dimensional species and demonstrates a trend in increasing complexity. The synthetic conditions; methods of structural characterization and descriptions of the structures of compounds 1-4 are presented. Crystal data for C14H10Cl3Cu3N4 (1), orthorhombic, Pna2(1), a = 18.6778(5) Angstrom, b = 5.1046(2) Angstrom, c = 16.6257(2) Angstrom, Z = 4; for C28H20Br2Cu2N8O2 (2), triclinic, <P(1)over bar>, a = 7.795(1) Angstrom, b = 8.857(1) Angstrom, c = 11.1268(2) Angstrom, alpha = 72.2(1)degrees, beta = 83.050(1)degrees, gamma = 73.832(1)degrees, Z = 1; for C14H10Br2Cu2N4 (3), monoclinic C2/c, a = 10.884(2) Angstrom, b =16.713(4) Angstrom, c = 9.307(2) Angstrom, beta = 113.199(5)degrees, Z = 4; and for C17H10Cu3N7 (4), monoclinic, P2(1)/n, a = 12.8549(2) Angstrom, b = 9.0875(1) Angstrom, c = 16.0023(2) Angstrom, Z = 4.