In the compound hexakis(2,6-diisopropylphenoxy)-di-μ-oxo-diniobium(V), [Nb(C 12 H 17 O) 3 (μ-O)] 2 , a distorted trigonal bipyramidal geometry is adopted around each Nb metal center by three terminal aryloxide O atoms and two non-symmetrically bridging oxo groups. Nb-O(bridging)=1.807 (2), 2.117 (3) A; Nb-O(aryLoxide)=1.874 (3), 1.877 (3), 1.880 (3) A
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Visciglio et al. (1994) studied this question.
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