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- W2077221520 abstract "Abstract This paper describes the syntheses of three transition metal diphosphonate compounds: Na4Zn{NH3CH(PO3)2}2·4H2O (1), Ni{NH3CH(PO3H)2}2·xH2O (2) and NaNi2{NH3CH(PO3)(PO3H0.5)}2(H2O)2·2H2O (3). Compound 1 contains chains of [ Zn { NH 3 CH ( PO 3 ) 2 } 2 ] n 4 n - made up of corner-sharing ZnO6 octahedra and CPO3 tetrahedra, which are further connected by tetramers of edge-sharing NaO6 octahedra, forming a three-dimensional open-framework structure. Compound 2 shows a square-grid layer structure where the NiO6 octahedra are corner shared with CPO3 tetrahedra. The adjacent layers are linked by strong inter-layer hydrogen bonds, resulting in a three-dimensional open-network structure with channels where the lattice water molecules reside. The structure of compound 3 is analogous to that of NaCo2{NH3CH(PO3)(PO3H0.5)}2(H2O)2·xH2O in which layers of Ni2{NH3CH(PO3)(PO3H0.5)}2(H2O)2 are connected by NaO6 linkages into an open-framework structure. The magnetic studies show that weak antiferromagnetic interactions are mediated between the nickel ions in compounds 2 and 3. Crystal data for 1: triclinic, space group P-1, a = 5.551 ( 2 ) A , b = 6.166 ( 2 ) A , c = 12.424 ( 4 ) A , α = 92.422 ( 6 ) ° , β = 92.687 ( 7 ) ° , γ = 93.926 ( 6 ) ° , V = 423.3 ( 2 ) A 3 , Z = 2 . For 2: triclinic, space group P-1, a = 9.043 ( 1 ) A , b = 9.180 ( 1 ) A , c = 9.271 ( 1 ) A , α = 89.693 ( 3 ) ° , β = 70.202 ( 3 ) ° , γ = 89.530 ( 3 ) ° , V = 724.1 ( 2 ) A 3 , Z = 2 ." @default.
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- W2077221520 date "2006-02-01" @default.
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- W2077221520 title "Metal phosphonates based on aminomethylenediphosphonate: Syntheses and characterization of Na4Zn{NH3CH(PO3)2}2·4H2O, Ni{NH3CH(PO3H)2}2·xH2O and NaNi2{NH3CH(PO3)(PO3H0.5)}2(H2O)2·2H2O" @default.
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- W2077221520 doi "https://doi.org/10.1016/j.jssc.2005.10.041" @default.
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