Publikation:

Ligand exchange and ligand migration reactions involving dicyclopentadienylniobium(III) carbonyl derivatives

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1979

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Otto, Eckart E. H.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-239501
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https://doi.org/10.1016/S0022-328X(00)81085-2
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Journal of Organometallic Chemistry. 1979, 170(2), pp. 209-216. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(00)81085-2

Zusammenfassung

The methylniobocene carbonyl (C5H5)2Nb(CH3)(CO) shows an unexpected lack of reactivity with respect to ligand migration. Whereas (C5H5)2V(CH3) has been reported to react with CO to yield the acetyl derivative (C5H5)2V(OC-CH3)(CO) immediately, we find that the niobocene analogue (C5H5)2Nb(CH3) reacts with CO only to regenerate (C5H5)2Nb(CH3)(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 (C5H5)2Nb(OCCH3).

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540 Chemie

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ISO 690OTTO, Eckart E. H., Hans-Herbert BRINTZINGER, 1979. Ligand exchange and ligand migration reactions involving dicyclopentadienylniobium(III) carbonyl derivatives. In: Journal of Organometallic Chemistry. 1979, 170(2), pp. 209-216. ISSN 0022-328X. Available under: doi: 10.1016/S0022-328X(00)81085-2
BibTex
@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>
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