SYNTHESIS OF MHPOBC-D(3) AND MHPOBC-D(43) AND BEHAVIOR OF METHYL-GROUP ATTACHED TO CHIRAL CARBON AS OBSERVED BY FT-IR, RAMAN AND NMR-SPECTROSCOPY

we have synthesized two deuterated MHPOBCs-MHPOBC-d(3) with the methyl group connecting to the chiral center deuterated, and MHPOBC-d(43), a ll deuterated but the methyl group near the chiral part. The polarizat ion angle dependence of FT-IR shows that the symmetric and asymmetric stretchings of methyl group are in-phase with those of phenyl rings in SA and electrically unwound SC phases, and the peak of CH3 of MHPOBC -d(43) splits into triplet in H-1 NMR and CD3 of MHPOBC-d(3) into doub ler in D-2 NMR.