A pronounced conformational preference of the 3'-alpha-cumyl substituent in 2-(2'-methoxy-3'-alpha-cumylphenyl)benzotriazole is suggested from the results of molecular dynamics simulations, This suggestion is supported by both solution NMR spectral and solid state x-ray crystallographic data. The orientation of the a cumyl substituent may have Implications on the relative performance of 3'-substituted 2'-hydroxyphenylbenzotriazole light stabilizers in polar media. (C) 1997 by John Wiley & Sons, Ltd.
SMOLENSKIJ, I. N.;GONTAR, S. S.;MARKOV, V. I., VOPR. XIMII I XIM. TEXNOL., KIEV, 1985, N 78, 112-117