Synthesis and Characterization of [Mo7O16(O3PCH2PO3)3]:8- A Mixed-Valent Polyoxomolybdenum Diphosphonate Anion with Octahedrally and Tetrahedrally Coordinated Molybdenum

Autor:	Eddy Dumas, Capucine Sassoye, Kristin D. Smith, Slavi C. Sevov
Rok vydání:	2002
Předmět:	Inorganic Chemistry Piperazine chemistry.chemical_compound Crystallography Mixed valent Chemistry Molybdenum chemistry.chemical_element Ethylenediamine Physical and Theoretical Chemistry Ion
Zdroj:	Inorganic Chemistry. 41:4029-4032
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic0202209
Popis:	Two new compounds containing the title diphosphono-polyoxometalate anion and diprotonated ethylenediamine (enH(2)) or piperazine (ppzH(2)) countercations have been hydrothermally synthesized and structurally characterized ((enH(2))(4)[Mo(7)O(16)(O(3)PCH(2)PO(3))(3)].7H(2)O, triclinic, P(-)1, Z = 2, a = 10.3455(7) A, b = 13.136(1) A, and c = 20.216(3) A, alpha = 93.247(6) degrees, beta = 96.434(6) degrees, and gamma = 111.900(6) degrees; (ppzH(2))(4)[Mo(7)O(16)(O(3)PCH(2)PO(3))(3)].8H(2)O, triclinic, P(-)1, Z = 2, a = 13.255(2) A, b = 13.638(2) A, and c = 16.874(4) A, alpha = 93.20(2) degrees, beta = 101.27(2) degrees, and gamma = 105.87(1) degrees). The anion is a ring of three pairs of edge-sharing octahedra of Mo(V)O(6) (with Mo(V)-Mo(V) bonds) that share corners with each other. The diphosphonate groups connect the pairs at the periphery. The ring is "capped" by a tetrahedron of Mo(VI)O(4). According to magnetic measurements, the compounds are diamagnetic.
Databáze:	OpenAIRE
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