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Intermolecular hydrogen bonds, rotational spectrum, and structure of van der Waals complexes of (CH3)2O⋯CF2CH2 and (CH3)2O⋯CF2CHF

✍ Scribed by Yoshio Tatamitani; Teruhiko Ogata

Book ID
104151781
Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
149 KB
Volume
222
Category
Article
ISSN
0022-2852

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✦ Synopsis

The results of molecular beam Fourier transform microwave (FTMW) investigations of the van der Waals complexes of dimethyl ether with 1,1-difluoroethene/trifluoroethene are reported. The rotational parameters of the complexes have been interpreted in terms of a C s geometry with the two methyl groups lying out of the r v symmetry plane of complexes. The complexes are bound with three hydrogen bonds of which one is the stronger O Á Á Á HAC type and two are the weaker F Á Á Á HAC types. Some additional information on the structure and the hydrogen bond has been obtained from ab initio calculations.

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## Abstract Rate constants for the gas‐phase reactions of CH~3~OCH~2~CF~3~ (__k__~1~), CH~3~OCH~3~ (__k__~2~), CH~3~OCH~2~CH~3~ (__k__~3~), and CH~3~CH~2~OCH~2~CH~3~ (__k__~4~) with NO~3~ radicals were determined by means of a relative rate method at 298 K. NO~3~ radicals were prepared by thermal d