Hydrothermal synthesis and crystal structure of a heteropolyoxotungstate formed by sandwich-type heteropolyanion [Gd(PW₁₁O₃₉)₂]11− and reduced [Cu(en)₂] + cations

摘要

A heteropolyoxotungstate, [Cu(en)₂]₂H₈[Gd(PW₁₁O₃₉)₂]  · (H₂en)_0.5  · 3H₂O (1), has been hydrothermally synthesized and characterized by IR, XPS, TGA and single-crystal X-ray diffraction. Compound 1 crystallizes in the triclinic system, space group P 1, with a  = 12.651(2) à 3, b  = 20.559(3) à 3, c  = 21.729(3) à 3, α  = 71.379(2), β  = 82.829(2), γ  = 75.532(2)°, V  = 5179.5(14) à 3, Z  = 2, R ₁  = 0.0702 and ωR ₂  = 0.1479. The heteropolyanion is composed of two monovacant [α-PW₁₁O₃₉]7− Keggin moieties linked via a Gd atom leading to a sandwich-type structure. The Gd center is in a distorted square antiprismatic coordination environment with eight oxygen atoms, four from each of the two [α-PW₁₁O₃₉]7−moieties.View full textDownload full textKeywordsPolyoxometalates, Lanthanide, Sandwich-type, Hydrothermal synthesisRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00958970801914793