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Magnetische Anisotropie Das Heptacyanowolframat(IV)‐Anion wurde synthetisiert und charakterisiert. Wie K. R. Dunbar und Mitarbeiter in ihrer Zuschrift auf S. 11540 ff. zeigen, verfügen seine Salze über außerordentlich große positive Nullfeldaufspaltungsparameter.
The heptacyanotungstate(IV) anion was isolated in the salt (n‐Bu4N)3[WIV(CN)7] (1) from the reduction of (n‐Bu4N)3[WV(CN)8] with concomitant loss of one cyanide ligand. The anion in 1 adopts a slightly distorted pentagonal bipyramidal geometry with an average W−C distance of 2.169 Å. The spectroscopic and magnetic properties are described.
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