S. Spassov, A. Orahovats, S. M. Mishev
1974
Citations
0
Influential Citations
10
Citations
Journal
Tetrahedron
Abstract
Abstract The NMR spectral characteristics of 1,2-diphenylpropane, 2,3-diphenylpropionic acid and its methyl ester have been measured with the view to investigating the conformational equilibria arising from the rotation about the phenyl-bearing C atoms. The analysis of these data has demonstrated the predominance of the conformer with anti-periplanar phenyls in all the cases studied. The values of the gauche nonbonded interaction energies (−1 ΔE kcal/mole) are found to be for Ph/Ph 0·8, for Ph/COOH 0·6 and for Ph/COOCH3 0·4.