摘要:
The reaction of [Ag-4(hfac)(4)(THF)(2)] (hfac(-) = 1, 1, 1,5,5,5-hexafluoroacetylacetonate, THF = tetrahydrofurrane) with 2,2'-bipyrimidine (bpm) leads to single crystals. They crystallise in the triclinic system, space group P (1) over bar. Their structure consists of [Ag-4(hfac)(4)(mu(2)-bpm)(3)] tetranuclear complexes. In this complex, Ag(I) ions adopt distorted square planar and trigonal prismatic geometries. When [Ag-4(hfac)(4)(THF)(2)] is replaced by monohydrated silver(l) perchlorate, a one-dimensional (ID) compound with a formula of [[Ag(mu(2)-bpm)](n)(+), nClO(4)(-) is obtained as single crystals. They crystallise in the monoclinic system, space group P2(1)/c. Their structure consists of [[Ag(mu(2)-bpm)](+)](n), chains separated by non-coordinated perchlorate ions. In the chains, the Ag(I) centres adopt a square planar geometry. Finally, starting from [[Ag(mu(2)-bpm)](+)](n), nClO(4)(-) and sodium oxalate (Na(2)ox; ox = C2O42-), another 1D compound with a formula of [Ag(mu(2)-bpm)(mu(2)-ox)](n), 4nH(2)O is obtained as single crystals. They crystallise in the triclinic system, space group P (1) over bar. In these chains, bipyrimidine and oxalate are alternate. They generate a square planar geometry around the Ag(I) cations. (c) 2007 Elsevier B.V. All rights reserved.