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A comment on the rotational isomerization of ethylene

✍ Scribed by L. Giroux; M.H. Back; R.A. Back

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 244 KB
Volume: 154
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)87162-3

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✦ Synopsis

Recent spectroscopic measurements have established a torsional barrier m ethylene of 95.5 kcal/mol, a 30 kcal/mol higher than the activation energy for thermal cis-trans isomerization.

It is shown that this difference can be explained in terms of a modest (11%1) increase in the C-C bond length as the molecule is twisted through 90", and its effect on the potential-energy surface for the isomerization.

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