Abstract
Covalently pillared layered metal phosphonate compounds were prepared by the reaction of divalent metal salts with alkylenebis(phosphonic acids). Cu(II) yields compounds Cu2[(O3PC2H4PO3)(H2O)2] (1) and Cu2[(O3PC3H6PO3)(H2O)2]·H2O (2) when copper sulfate was reacted with ethylenebis(phosphonic acid) and propylenebis(phosphonic acid), respectively. The corresponding bis(phosphonates) obtained for the reaction with zinc chloride are Zn2[(O3PC2H4PO3)(H2O)2] (3) and Zn2[(O3PC3H6PO3)] (4). The structures of these four compounds were determined ab initio from their X-ray powder diffraction data and refined by Rietveld methods. Crystal data for compound 1: space group P21/c, a = 8.0756(1) A, b = 7.5872(1) A, c = 7.4100(1) A, β = 116.319(1)°, Z = 2. Crystal data for compound 2: space group Pnc2, a = 4.3276(2) A, b = 17.3181(8) A c = 6.7624(3) A, Z = 2. Crystal data for compound 3: space group P21/n, a = 5.6861(8) A, b = 15.230(2) A, c = 4.7923(6) A, β = 91.936(2)°. Crystal data for compound 4: space group Pna2...
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