Nonlinear effects (NLEs) have been used as a new tool to characterize
the various modifications of a chiral titanium complex used in stoichi
ometric or catalytic mode in asymmetric sulfoxidation by cumyl hydrope
roxide. Spectacular changes from (+)- to (-)-NLEs were observed for mi
nor modifications of the experimental conditions. (C) 1998 Elsevier Sc
ience Ltd. All rights reserved.