Restricted rotation about the aliphatic carbon–carbon bond in 1,2-disubstituted tetra-arylethanes
作者:P. J. M. Burchill、N. Thorne
DOI:10.1039/j39680000696
日期:——
The existence of stable rotational isomers of 1,2-dichlorotetraphenylethane previously reported, is shown to be incorrect, since dipole moment measurements indicate the presence of the trans-form only. Infrared studies of a number of 1,2-disubstituted tetra-arylethanes fail to account for the existence of possible gauche-forms, except in the case of the ethane-1,2-diols which occur exclusively in this