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Raman study of conformational equilibrium in plastic solid dodecamethylcyclohexasilane Si6Me12 (1994)

Bukalov, S. S. ; Leites, L. A. ; Antipova, B. A. ; [et al.]

Springer

Russian chemical bulletin 43 (1994), S. 57-59

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ISSN: 1573-9171

Keywords: polysilanes ; phase transition ; plastic phase ; conformational equilibrium ; Raman spectroscopy

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract The temperature dependence of the Raman spectrum of solid dodecamethylcyclohexasilane Si6Me12 has been studied in the temperature interval 20–235 °C. At 72 °C the substance undergoes a phase transition of an «order-disorder» type, from the ordered crystalline modification to the plastic mesophase with isotropic molecular reorientations. This phase transition is accompanied by the appearance of a conformational equilibrium in the solid state. An analogous equilibrium is also observed in a benzene solution, where the concentration of the second conformer is already noticeable at 6 °C.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00699135

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