ROTATIONAL ENERGY BARRIER OF THE POLARIZED CARBON-CARBON DOUBLE-BOND IN 3-(4-DIMETHYLAMINOBENZYLIDENE)PENTANE-2,4-DIONE

Authors
YAVARI I ZONOUZI A HEKMATSHOAR R
Citation
I. Yavari et al., ROTATIONAL ENERGY BARRIER OF THE POLARIZED CARBON-CARBON DOUBLE-BOND IN 3-(4-DIMETHYLAMINOBENZYLIDENE)PENTANE-2,4-DIONE, Tetrahedron letters, 39(22), 1998, pp. 3841-3842
Citations number
10
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
39
Issue
22
Year of publication
1998
Pages
3841 - 3842
Database
ISI
SICI code
0040-4039(1998)39:22<3841:REBOTP>2.0.ZU;2-Q
Abstract
A dynamic NMR effect is observed in the H-1 NMR spectra of the title c ompound in the vicinity of 186 degrees C, and is attributed to restric ted rotation around the polarized carbon-carbon double bond. The free allergy of activation (Delta G(not equal)) for this process is 10(5) /- 2 k J mol(-1) in nitrobenzene as a solvent. (C) 1998 Published by E lsevier Science Ltd. All rights reserved.