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X-ray powder diffraction data and thermal expansion of N(CH3)4Br and N(CH3)4I

Published online by Cambridge University Press:  10 January 2013

Alex Xenopoulos ,
Martina Ralle ,
Anton Habenschuss  and
Bernhard Wunderlich
Alex Xenopoulos
Affiliation:
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197 Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
Martina Ralle
Affiliation:
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197 Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
Anton Habenschuss
Affiliation:
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197 Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
Bernhard Wunderlich
Affiliation:
Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6197 Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600
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Abstract

The X-ray powder diffraction patterns for tetramethylammonium bromide and iodide have been measured from near room temperature up to decomposition/sublimation. The unit cell parameters were refined and the coefficients of thermal expansion calculated. Unlike N(CH3)4Cl [M. Stammler, J. Inorg. Nucl. Chem. 29, 2203–2221 (1967)], N(CH3)4Br (1Br) and N(CH3)4I (1I) undergo no solid–solid transitions before decomposition/sublimation as was observed earlier by thermal analysis [S. S. Chang and E. F. Westrum, J. Chem. Phys. 36(9), 2420–2423 (1962); Coulter etal., J. Am. Chem. Soc. 62, 2845–2851 (1940); Xenopoulos etal., Mol. Cryst. Liq. Cryst. 214, 63–79 (1992)].

Type
Research Article
Information
Powder Diffraction , Volume 11 , Issue 3 , September 1996 , pp. 246 - 249
Copyright
Copyright © Cambridge University Press 1996

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