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Forskningsartikel2007Vetenskapligt granskad

Synthesis and X-ray single crystal study of niobium and tantalum oxo-ethoxo-perrhenates, (M4O2)-O-V(OEt)(14)(ReO4)(2)

Nikonova OA, Kessler VG, Drobot DV, Shcheglov PA, Seisenbaeva GA

Sammanfattning

Niobium and tantalum oxo-ethoxo-perrhenates, (M4O2)-O-v(OEt)(14)(ReO4)(2), are easily obtained in high yields via interaction of metal ethoxides, M-v(OEt)(5), with rhenium heptoxide, Re2O7, in hydrocarbon solvents. The complexes have good solubility in hexane and toluene and are stable in solution at room temperature. Their molecular structures are based on a tetranuclear M-4(mu-O)(2)(mu-OR)(4)X-12 core, X = OR, ReO4, composed of two pairs of edge-sharing octahedra joined via two almost linear oxo-bridges containing a rectangular flat M-4-arrangement. The perrhenate ligands are attached in a centrosymmetric manner to the two opposite corners of the rectangle. (c) 2006 Elsevier Ltd. All rights reserved

Nyckelord

Metal alkoxide; Molecular precursor; Sol–gel; Rhenium; Niobium; Tantalum; Structure

Publicerad i

Polyhedron
2007, Volym: 26, nummer: 4, sidor: 862-866
Utgivare: PERGAMON-ELSEVIER SCIENCE LTD