Conformations of some substituted diphenylmethanes and their dehydrogeno-dimers by electric birefringence, dipole moment, and infrared measurements

Abstract

The meso- and (±)-diastereoisomers of the chloro-, bromo-, and iodo-derivatives of the ethane [Ph(p-XC₆H₄)CH]₂ are prepared by free-radical dimerisation. Their conformations, as well as those of the corresponding monomers Ph(p-XC₆H₄)CH₂, are examined by electric birefringence, dipole moment, and i.r. spectroscopic measurements.