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- W2041194620 abstract "Diphenyl-o-methoxyphenylmethyl methacrylate was polymerized with several organolithium complexes of chiral ligand such as (−)-sparteine (Sp) and (S,S)-(+)-2,3-dimethoxy-1,4-bis(dimethylamino)butane (DDB). (+)-DDB was effective in preparing a polymer of high optical rotation, whereas (−)-Sp only gave oligomers with low optical rotation for the repulsive hindrance between the bulky ester group and the rigid ligand. The optical rotation of the polymer decreased rapidly to a constant value due to the propeller-propeller transition, which has been demonstrated by 1H n.m.r. and circular dichroic spectra." @default.
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- W2041194620 date "1993-01-01" @default.
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- W2041194620 title "Synthesis and propeller-propeller transition of optically active poly(diphenyl-o-methoxyphenylmethyl methacrylate)" @default.
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- W2041194620 doi "https://doi.org/10.1016/0032-3861(93)90416-8" @default.
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