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Comment on “The evolution between slow and rapid chemical exchange processes in a liquid binary mixture”

✍ Scribed by Martyn C.R. Symons

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
147 KB
Volume
208
Category
Article
ISSN
0009-2614

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✦ Synopsis

It is suggested that the infrared spectra for the C-N stretch of CH&N in methanol and water give evidence for a kinetic averaging of individual bands. The situation is similar to that described in the Letter by Besnard, CabaGo and Yatwood.

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We emphasise that a collapsing infrared or Raman band profile with increasing temperature doesnot necessarily imply a movement between the "slow" and "rapid" exchange regimes. We point to systems where band collapse occurs in the slow regime and suggest that for a CH,CN/CH,OH binary mixture the spec

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Binary mixtures of pyridine and ethanol display Raman spectra (111 of pyridine) with significantly different band shapes at different temperatures (between 98 and 368 K). At the lowest temperature these spectra indicate the formation of a hydrogenbonded complex in the slow modulation limit (giving a