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Synthesis and characterization of two novel organocation containing group 13 metal ethylenediphosphonates
Authors:Martin P Attfield  Howard G Harvey
Institution:
  • a Department of Chemistry, Institute of Science and Technology, University of Manchester, UMIST, P.O. Box 88, Manchester M60 1QD, UK
  • b Davy-Faraday Research Laboratory, The Royal Institution of Great Britain, 21 Albemarle Street, London W1S 4BS, UK
  • c CLRC Daresbury Laboratory, Daresbury, Warrington, Cheshire WA4 4AD, UK
  • Abstract:Two novel group 13 metal diphosphonates: (H3NC3H6NH3)2Al2F6(O3PC2H4PO3)]·H2O (1) (monoclinic, C2/c, a=16.9697(7) Å, b=8.0273(4) Å, c=16.3797(8) Å, β=117.762(2)°, Z=4, R1=4.66%, wR2=11.82%), and (H3NC3H6NH3)Ga2F4(O3PC2H4PO3)] (2) (triclinic, P-1, a=5.398(7) Å, b=8.122(6) Å, c=15.839(18) Å, α=78.89(4)°, β=89.60(7)°, γ=79.35(6)°, Z=2, R1=2.90%, wR2=3.17%) have been synthesized by solvothermal methods in the presence of the propyldiammonium cations and their structures determined using single and micro-crystal X-ray diffraction data, respectively. The structures of 1 and 2 are closely related and contain dimers of edge-sharing trivalent metal centered octahedra that are linked together by the ethylenediphosphonate groups to form chains and aperture-containing layers, respectively. The propyldiammonium cations surround the aluminum diphosphonate chains in 1 and separate the gallium diphosphonate layers in 2. Both compounds 1 and 2 are examples of metal phosphonate materials containing only one type of octahedral-tetrahedral secondary building unit (SBU-4).
    Keywords:Aluminum  Gallium  Diphosphonate  Hybrid organic-inorganic material  Crystal structure  Edge-sharing octahedra
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