DETECTION OF THE SITE OF AN ENANTIOSELECTIVE INTERACTION BETWEEN CHIRAL POLYPINANYLSILANE AND A HYDROPHOBIC ENANTIOMER BY USE OF CIRCULAR-DICHROISM

Since optically active poly(methylpinanylsilane) synthesized by Na-med iated polycondensation of the corresponding dichlorosilane showed an C otton effect at the UV region of Si sigma-Si sigma transition of the main chain in the circular dichroism (CD) spectrum, the main chain was found to have a chirality. The Cotton bands in the presence of the ()-isomer of a hydrophobic compound were different from those in the pr esence of the (-)-isomer. Therefore, this polymer was found to have an ability of the enantioselective recognition. On the other hand, a hyd rophilic compound did not affect the CD band. These findings indicate that the recognition was caused mainly by hydrophobic diastereomeric i nteraction between the chiral compound and the chiral main chain in th is polymer.