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題 名 | Conformational Analysis of Biphenyl Derivatives(I)--A Novel Steric Constant from the Internal Rotation Rate of 2,2'-Bis-(N-Substituted Carbamoylmethyl)Biphenyl by Means of Dynamic NMR |
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作 者 | 林家立; 黃靜瑩; 周黃珠月; 蔡厚仁; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 47:3 2000.06[民89.06] |
頁 次 | 頁449-454 |
分類號 | 346.01 |
關鍵詞 | Conformational analysis; Stereochemistry; Steric constant; Dynamic NMR; |
語 文 | 英文(English) |
英文摘要 | A novel scale of steric substituent constant EsD is defined from the correlation of the logarithms of the internal rotation rate (kr) at 393 K with Hancock (Esc) steric constant by means of dynamic NMR. In the inhibition of Pseudomona species lipase by 2,2�S-bis-(N-substituted carbamoylmethyl)biphenyls (1-8), the logarithms of bimolecular rate constants are multiply correlated with both the Taft substituent constant ��* and EsD. |
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