title: Pillared layered structures based upon M(III) ethylene diphosphonates: the synthesis and crystal structures of M(III)(H(2)O)(HO(3)P(CH(2))(2)PO(3)) (M = Fe, Al, Ga).
abstract: A three-dimensional iron(III) diphosphonate, Fe(III)(H(2)O)(HO(3)P(CH(2))(2)PO(3)), I, has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction. The compound crystallizes in the orthorhombic space group Pbca (no. 61) where a = 9.739(5) A, b = 9.498(5) A, c = 15.940(8) A, V = 1474.4(1) A(3), Z = 8, and R(1) = 0.0380. The structure consists of inorganic sheets pillared by the 1,2-ethylenediphosphonate groups. The sheets are composed of Fe(H(2)O)O(5) octahedra connected through PO(3)C tetrahedra. The corresponding isostructural aluminum (II) and gallium (III) compounds were also synthesized and indexed: II, a = 9.534(1) A, b = 9.255(2) A, c = 15.724(1) A, V = 1387.5(1) A(3); III, a = 9.670(1) A, b = 9.357(2) A, c = 15.862(4) A, V = 1435.4(1) A(3).
authors: Materials Research Laboratory, University of California, Santa Barbara, California 93106-5121, USA.
authors: Crystal A
authors: CA
authors: Merrill
authors: Anthony K
authors: AK
authors: Cheetham
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004164:Diphosphonates / Q000737:chemistry*; D005030:Ethylenes / Q000737:chemistry*; D005708:Gallium / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D019216:Metals, Heavy / Q000737:chemistry*; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D004164:Diphosphonates; D005030:Ethylenes; D019216:Metals, Heavy; D009942:Organometallic Compounds; C036216:ethylene; D005708:Gallium; D000535:Aluminum; D007501:Iron