@article{Otto1979Ligan-23950,
  year={1979},
  doi={10.1016/S0022-328X(00)81085-2},
  title={Ligand exchange and ligand migration reactions involving dicyclopentadienylniobium(III) carbonyl derivatives},
  number={2},
  volume={170},
  issn={0022-328X},
  journal={Journal of Organometallic Chemistry},
  pages={209--216},
  author={Otto, Eckart E. H. and Brintzinger, Hans-Herbert}
}

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    <dcterms:abstract xml:lang="eng">The methylniobocene carbonyl (C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;Nb(CH&lt;sub&gt;3&lt;/sub&gt;)(CO) shows an unexpected lack of reactivity with respect to ligand migration. Whereas (C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;V(CH&lt;sub&gt;3&lt;/sub&gt;) has been reported to react with CO to yield the acetyl derivative (C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;V(OC-CH&lt;sub&gt;3&lt;/sub&gt;)(CO) immediately, we find that the niobocene analogue (C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;Nb(CH&lt;sub&gt;3&lt;/sub&gt;) reacts with CO only to regenerate (C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;Nb(CH&lt;sub&gt;3&lt;/sub&gt;)(CO), from which it was obtained by photolysis. This resistance of the methylniobocene carbonyl derivative towards ligand migration is interpreted in terms of the bonding properties of the acetyl intermediate (C&lt;sub&gt;5&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;Nb(OCCH&lt;sub&gt;3&lt;/sub&gt;).</dcterms:abstract>
    <dcterms:title>Ligand exchange and ligand migration reactions involving dicyclopentadienylniobium(III) carbonyl derivatives</dcterms:title>
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    <dc:creator>Brintzinger, Hans-Herbert</dc:creator>
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    <dc:contributor>Brintzinger, Hans-Herbert</dc:contributor>
    <dcterms:bibliographicCitation>Journal of Organometallic Chemistry ; 170 (1979), 2. - S. 209-216</dcterms:bibliographicCitation>
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    <dcterms:issued>1979</dcterms:issued>
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