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Co{sub 3}{l_brace}CH{sub 3}C(NH{sub 3})(PO{sub 3}H)(PO{sub 3}){r_brace}{sub 2} {l_brace}CH{sub 3}C(NH{sub 3})(PO{sub 3}H){sub 2}{r_brace}{sub 2}(H{sub 2}O){sub 4}.2H{sub 2}O: A cobalt 1-aminoethylidenediphosphonate with a layer structure

Journal Article · · Journal of Solid State Chemistry
 [1];  [1];  [2];  [1]
  1. State Key Laboratory of Coordination Chemistry, Department of Chemistry, Coordination Chemistry Institute, Nanjing University, Nanjing 210093 (China)
  2. State Key Lab of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100870 (China)
This paper describes the structure and magnetic properties of a novel cobalt 1-aminoethylidenediphosphonate compound, namely Co{sub 3}{l_brace}CH{sub 3}C(NH{sub 3})(PO{sub 3}H)(PO{sub 3}){r_brace}{sub 2}{l_brace}CH{sub 3}C(NH{sub 3})(PO{sub 3}H){sub 2}{r_brace}{sub 2}(H{sub 2}O){sub 4}.2H{sub 2}O (1). The structure contains a trimer unit of Co{sub 3}{l_brace}CH{sub 3}C(NH{sub 3})(PO{sub 3}H)(PO{sub 3}){r_brace}{sub 2} in which two equivalent phosphonate ligands chelate and bridge the three cobalt ions. Each trimer unit is further linked to its four equivalent neighbors through corner-sharing of CoO{sub 6} octahedra and CPO{sub 3} tetrahedra, forming a two-dimensional layer in the bc-plane which contains 12-membered rings. These layers are connected to each other by extensive hydrogen bonds. Magnetic studies show that weak antiferromagnetic interactions are mediated between the cobalt ions. Crystal data for 1: monoclinic, space group C2/c, a=27.727(4), b=7.1091(11), c=19.827(3)A, {beta}=118.488(3), V=3434.9(9)A{sup 3}, Z=2.
OSTI ID:
20725872
Journal Information:
Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 4 Vol. 178; ISSN 0022-4596; ISSN JSSCBI
Country of Publication:
United States
Language:
English