A Study on the phase transition in decamethylosmocene crystal over a wide temperature range View Full Text


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Article Info

DATE

2000-03

AUTHORS

I. I. Vorontsov, K. A. Potekhin, M. Yu. Antipin, I. E. Zanin

ABSTRACT

The reversible structural phase transition accompanied by the doubling of the unit cell parameter c and a change in the space group is found in the decamethylosmocene crystal Cp2* at a temperature of 243 ± 5 K. In the high-temperature (HT) phase (space group P21/m, Z = 2), the molecule adopts an eclipsed conformation and lies in the mirror symmetry plane. In the low-temperature (LT) phase (space group P21/c, Z = 4), the molecule occupies the general position with a small rotation of the ligands. The structural transformations from the high-temperature phase into the low-temperature phase at 120 K are described by the deviation of the molecular axis of fivefold symmetry by 3.2(2)° and the displacement of the center of mass of the molecule by 0.173(2) Å with respect to their positions in the high-temperature phase, and also by the rotation of the Cp* ligands in the same direction by 3.0(2)° and 5.4(2)°, respectively. More... »

PAGES

234-243

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/1.171171

DOI

http://dx.doi.org/10.1134/1.171171

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1017927082


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