Abstract
Abstractl‐Menthyl vinyl ether (l‐MVE) was homopolymerized and copolymerized with the monomers indene (IN) and acenaphthylene (ANp) by BF3OEt2 as a catalyst. The chiral menthyl substituent was cloven from the homopolymers and copolymers using dry‐hydrogen bromide gas. After the removal of optically active menthyl group, poly(vinyl alcohol) (PVA) from l‐MVE homopolymer was optically inactive, and copolymers (VA‐IN, VA‐ANp) from l‐MVE‐IN and l‐MVE‐ANp copolymers were still optically active. Hence, in the case of l‐MVE homopolymer, it was concluded that asymmetric induction in the polymer main chain can only produce pseudoasymmetry. In the case of l‐MVE‐IN and l‐MVE‐ANp copolymers, it was found that asymmetric induction proceeded in the copolymer main chain and was caused by the influence of chiral menthyl group.
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