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Chemical bonding in metalaheterocumulene complexes : II Demonstration of a temperature dependant conformational disorder of the methyl groups in [(CO)5CrNCN(C2H5)2]

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1995

Autor:innen

Ohnet, Marie-Noëlle
Spasojevic-de Biréa, Anne
Quy Dao, Nguyen
Schweiss, Peter
Kiat, Jean-Michel
Gregoire, Pierre
Reindl, David

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Journal of Organometallic Chemistry. 1995, 490(1-2), pp. 29-34. ISSN 0022-328X. eISSN 1872-8561. Available under: doi: 10.1016/0022-328X(94)05205-P

Zusammenfassung

During the determination of the crystal structure of [(CO)5CrNCN(C2H5)2] by neutron diffraction, a remarkable te temperature-dependance of the intensity of three reference reflections between 100 and 300 K was accidentally observed. In order to try to understand the nature of this phenomenon, the behaviour of this compound as a function of the temperature has been studied by differential calorimetry, and by power and single crystal X-ray diffraction methods. These experiments show neither a phase transition nor a crystal space group modification. The experimental results, supported by a simplified model, suggest a rotational disorder of the methyl groups near room temperature.

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Fachgebiet (DDC)
540 Chemie

Schlagwörter

Chromium, X-ray structure, Neutron structure, Conformational disorder, Metalaheterocumulene

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ISO 690OHNET, Marie-Noëlle, Anne SPASOJEVIC-DE BIRÉA, Nguyen QUY DAO, Peter SCHWEISS, Jean-Michel KIAT, Pierre GREGOIRE, Helmut FISCHER, David REINDL, 1995. Chemical bonding in metalaheterocumulene complexes : II Demonstration of a temperature dependant conformational disorder of the methyl groups in [(CO)5CrNCN(C2H5)2]. In: Journal of Organometallic Chemistry. 1995, 490(1-2), pp. 29-34. ISSN 0022-328X. eISSN 1872-8561. Available under: doi: 10.1016/0022-328X(94)05205-P
BibTex
@article{Ohnet1995Chemi-23324,
  year={1995},
  doi={10.1016/0022-328X(94)05205-P},
  title={Chemical bonding in metalaheterocumulene complexes : II Demonstration of a temperature dependant conformational disorder of the methyl groups in [(CO)5CrNCN(C2H5)2]},
  number={1-2},
  volume={490},
  issn={0022-328X},
  journal={Journal of Organometallic Chemistry},
  pages={29--34},
  author={Ohnet, Marie-Noëlle and Spasojevic-de Biréa, Anne and Quy Dao, Nguyen and Schweiss, Peter and Kiat, Jean-Michel and Gregoire, Pierre and Fischer, Helmut and Reindl, David}
}
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