1,8−Bis(diphenylamino)− and 1,8−Bis(methylphenylamino)naphthalene: Molecular Structure and Dynamic Behavior

The title compounds 2 and 3 have been synthesized from 1,8−diaminonaphthalene. The molecular structure of 2 has been determined by X−ray structure analysis and is discussed with regard to the arrangement of the peri−diphenylamino substituents in the crystalline state and the steric strain in the molecule. NMR studies of 3 reveal two conformational processes. Their nature is discussed and barriers are reporte