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Präparative, 11B-, 93Nb-NMR-spektroskopische und strukturelle Untersuchungen an Cp2NbBH4- und [CpNb(B2H6)]2-Komplexen (= PREPARATORY ANALYSIS, B-11 NMR-SPECTROSCOPY, NB-93 NMR-SPECTROSCOPY AND STRUCTURAL-ANALYSIS OF CP2NBBH4 COMPLEXES AND [CPNB(B2H6)] COMPLEXES)

URN to cite this document:
urn:nbn:de:bvb:355-epub-230404
Brunner, Henri ; Gehart, G. ; Meier, W. ; Wachter, Joachim ; Wrackmeyer, B. ; Nuber, B. ; Ziegler, M. L.
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Date of publication of this fulltext: 04 Jan 2012 08:38


Abstract

NbCl5 reacts with NaBH4 and LiCp+ (Cp+ = EtMe4C5) dependent on the stoichiometry and temperature to give Cp+2NbCl2 (1), CP+2Nb2Cl2(B2H6)(2), CP+2NbBH4(3a) and Cp+ 2Nb2(B2H6)2 (4a). With a large excess of NaBH4, Cp+ 2NbCl2 gives 2 at 25-degrees-C, which reacts further with NaBH 4 to give 4a. The synthesis of the deep violet, very stable 4a can be generalised by using C5Me5Li and tBUC5H4Li, ...

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