Solid state coordination chemistry of the oxofluorovanadium–diphosphonate system in the presence of Cu(II)–tetrapyridylpyrazine complex cations: The crystal structures of [{Cu2
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文摘
The hydrothermal reactions of V2O5, Cu(CH3CO2)2·H2O, tetrapyridylpyrazine (tpyprz), HF and the appropriate diphosphonic acid yielded a series of compounds of the JRY-1&_mathId=mml4&_user=10&_cdi=6922&_rdoc=15&_acct=C000050221&_version=1&_userid=10&md5=19525d6bc19e3bd85fb86f56de0d4ac5""> family of materials. The structure of [{Cu2(tpyprz)(H2O)2}V4F6O6(HO3PCH2PO3)2] (1) is one-dimensional, constructed from mixed valence clusters linked through {Cu2(tpyprz)(H2O)2}4+ rods. The two-dimensional [{Cu2(tpyprz)(H2O)2}V4F6O6(O3PCH2CH2PO3)] (2) is constructed from chains crosslinked by {Cu2(tpyprz))(H2O)2}4+ rods; mixed valence clusters are embedded in the network. Compound 3, [Cu2(tpyprz){HO3P(CH2)3PO3H}][V2F2O5], consists of chains and isolated {V2F2O5}2− anions. Structures 1–3 are compared to the structures of the analogous series , where bisterpy is 2,2′:4′:4″:2″,2-quaterpyridine, 6′,6″-di-2-pyridinyl. The temperature-dependent magnetic susceptibilities of 2 and 3 are also discussed.

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