Raman and Infrared Spectroscopic Studies of the Low- and High-Temperature Forms of Octahalo Cyclic Phosphazene Tetramers, $P_4N_4Cl_8$ and $P_4N_4F_8$

Varma, Vijay and Fernandes, JR and Rao, CNR (1989) Raman and Infrared Spectroscopic Studies of the Low- and High-Temperature Forms of Octahalo Cyclic Phosphazene Tetramers, $P_4N_4Cl_8$ and $P_4N_4F_8$. In: Journal of Molecular Structure, 198 . pp. 403-412.

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Abstract

Based on a study of the Raman and infrared spectra, normal vibrations of the low-temperature skew-tub $(S_4)$ and high-temperature $C_i$ or $C_{2h}$ (skew-chair) forms of $P_4N_4Cl_8$ have been assigned. A temperature variation study of the Raman spectra has shown the coexistence of both the forms of $P_4N_4Cl_8$ in the phase transition region. Preliminary assignments of the Raman and infrared spectra of the low- and high-temperature forms of $P_4N_4F_8$ are presented. One of the low-frequency Raman modes softens through the phase transition of $P_4N_4F_8$ at 199 K.

Item Type:	Journal Article
Publication:	Journal of Molecular Structure
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	02 Jun 2006
Last Modified:	19 Sep 2010 04:28
URI:	http://eprints.iisc.ac.in/id/eprint/7480

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