Bromine NQR Study of Structure and Molecular Torsional Motion in $N_4P_4Br_8$ And $N_3P_3Br_6$

Sridharan, KR and Ramakrishna, J (1983) Bromine NQR Study of Structure and Molecular Torsional Motion in $N_4P_4Br_8$ And $N_3P_3Br_6$. In: Polyhedron, 2 (6). pp. 427-430. (In Press)

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Abstract

The bromine NQR spectrum of tetrameric bromocyclophosphazene, $N_4P_4Br_8$, has been studied in the temperature range from 77 to 300 K. The negative temperature coefficients of the resonance frequencies have been analysed using Bayer-Kushida-Brown equations. Torsional modes in the frequency range $10-15 cm^{-1}$ are shown to characterise the observed motional averaging and are only slightly temperature dependent. The multiplicity and relative intensities of resonances in the trimer, $N_3P_3Br_6$, have been correlated with the known electron density distribution. The results for the bromo-derivatives are compared with those reported for the corresponding chloro-derivatives.

Item Type:	Journal Article
Publication:	Polyhedron
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Jul 2008
Last Modified:	19 Sep 2010 04:47
URI:	http://eprints.iisc.ac.in/id/eprint/15147

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