Surprisingly, the aryl-aryl rotation barrier of biphenyl derivatives ortho-substituted by the “small” HC=O and HC=CH2 groups (10.0 and 8.4 kcal mol-1, respectively) were found greater than those observed in biphenyls ortho-substituted by the “large” t-BuC=O and t-BuC=CH2 groups (6.7 and 6.9 kcal mol-1, respectively).
L. Lunazzi, A. Mazzanti, M. Minzoni (2006). Unexpected Stereodynamic Consequences of the Restricted Rotations in ortho-Acyl- and ortho-Vinyl Biphenyls. JOURNAL OF ORGANIC CHEMISTRY, 71, 9297-9301 [10.1021/jo0613131].
Unexpected Stereodynamic Consequences of the Restricted Rotations in ortho-Acyl- and ortho-Vinyl Biphenyls.
LUNAZZI, LODOVICO;MAZZANTI, ANDREA;MINZONI, MIRKO
2006
Abstract
Surprisingly, the aryl-aryl rotation barrier of biphenyl derivatives ortho-substituted by the “small” HC=O and HC=CH2 groups (10.0 and 8.4 kcal mol-1, respectively) were found greater than those observed in biphenyls ortho-substituted by the “large” t-BuC=O and t-BuC=CH2 groups (6.7 and 6.9 kcal mol-1, respectively).File in questo prodotto:
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