metal-organic compounds
Colourless crystals of polymeric diaquatetrakis(μ-1,2-benzenedicarboxylato)di-μ-nitrato-pentastrontium(II), [Sr5(C8H4O4)4(NO3)2(H2O)2]n, crystallized at the phase boundary of an aqueous silica gel containing sodium phthalate (1,2-benzenedicarboxylate) and an aqueous solution of Sr(NO3)2. Three crystallographically distinct SrII ions, one located on a centre of symmetry, are connected by two crystallographically distinct phthalate anions, one nitrate anion and a water molecule, to form a layered coordination polymer. These layers, perpendicular to [001], are held together by weak interatomic forces, as no interlayer hydrogen bonds were found.
metal-organic compounds
Yellow crystals of the title compound, poly[[aqualithium(I)]-μ3-iodofumarato], [Li(HOOC—CH=CI—COO)(H2O)]n, crystallized unexpectedly from an aqueous solution containing acetylenedicarboxylic acid and LiI. The lithium cation is coordinated tetrahedrally by four O atoms of three iodofumarate anions and one water molecule. These tetrahedra are connected such that a layered coordination polymer is formed.
metal-organic compounds
From a solution of [Zn(H2O)6](NO3)2 and acetylenedicarboxylic acid in deionized water, single crystals of zinc acetylenedicarboxylate dihydrate, {[Zn(C4O4)(H2O)2]}n, were obtained by slow evaporation of the solvent. The asymmetric unit consits of one zinc cation which is located on a centre of symmetry, half of an acetylenedicarboxylate anion, the anion lying on a twofold axis, and one water molecule in a general position. Thus, zinc is octahedrally coordinated by four O atoms of acetylenedicarboxylate anions and two water molecules in trans positions. These octahedra are connected by dicarboxylate ligands into a three-dimensional network.