Pressure-tuning Raman and infrared spectra of N-thiocyanato[tris(o-tolyl)]tin(IV), (o-CH.sub.3C.sub.6H.sub.4).sub.3SnNCS

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Date: Dec. 15, 2006
From: Journal of Molecular Structure(Vol. 825, Issue 1-3)
Publisher: Elsevier B.V.
Document Type: Report
Length: 221 words

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Abstract :

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.molstruc.2006.04.030 Byline: Zhenhua Xu (a), Ivor Wharf (b), Ian S. Butler (b) Keywords: Raman; Infrared; High pressure; Phase transition; Tin; N-thiocyanato[tris(o-tolyl)]tin(IV) Abstract: The effect of high external pressures on the Raman and IR spectra of the title compound (I) has been examined at ambient temperature. A pressure-induced phase transition was observed at 13-16kbar, which is most likely second-order, resulting from slight rotations of the phenyl rings and/or the CH.sub.3 groups under the influence of pressure. No new peaks were observed in the spectra with increasing pressure indicating that no pressure-induced linkage isomerism or SnNCSa[macron]Sn bridging took place. The average pressure sensitivity (d[nu]/dP) of the Raman-active vibrational modes is lower in the low-pressure region (0.23cm.sup.-1/kbar) than in the high-pressure one (0.47cm.sup.-1/kbar). In general, the IR-active modes are less sensitive to increasing pressure than are the Raman-active modes and the average d[nu]/dP value for the IR-active modes in the low-pressure region is quite similar to that in the high-pressure region, i.e., about 0.23cm.sup.-1/kbar. Author Affiliation: (a) State Key Laboratory of Rare Earth Material Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China (b) Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Que., Canada H3A 2K6 Article History: Received 23 March 2006; Accepted 13 April 2006

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Gale Document Number: GALE|A196005779