Publikation: 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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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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OHNET, 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-PBibTex
@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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