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Extra polar interactions in the transition states of the cross cycloadditions of differently substituted trifluorostyrenes *** of the cycloaddition of p-trifluoromethyltrifluorostyrene and p-methoxytrifluorostyrcne

Extra polar interactions in the transition states of the cross cycloadditions of differently substituted trifluorostyrenes *** of the cycloaddition of p-trifluoromethyltrifluorostyrene and p-methoxytrifluorostyrcne

作     者:JI Guo-Zhen SHI Yi-Qun JIANG Xi-Kui Shanghai Institute of Organic Chemistry,345 Ling Ling Lu,Shanghai,200032,China JI Guo-Zhen SHI Yi-Qun JIANG Xi-Kui Shanghai Institute of Organic Chemistry,345 Ling Ling Lu,Shanghai,200032,China

作者机构:Shanghai Institute of Organic Chemistry 345 Ling Ling Lu Shanghai 200032 China 

出 版 物:《Acta Chimica Sinica(English Edition)》 (化学学报(英文版))

年 卷 期:1988年第6卷第4期

页      面:364-371页

学科分类:07[理学] 0703[理学-化学] 

主  题:Extra polar interactions in the transition states of the cross cycloadditions of differently substituted trifluorostyrenes 1.Kinetics of the cycloaddition of p trifluoromethyltrifluorostyrene and p methoxytrifluorostyrcne 

摘      要:The rate constants for cross-cycloaddition and homo-cycloaddition reactions of p-me-thoxytrifluorostyrene and p-trifluoromethyltrifluorostyrene have been measured at 110-160℃ withthe help of the“KINETICS-Icomputer *** data,particularly the ■ function values(1.4-1.9)which are defined by eq 10 and related to the tendency of cross-cycloaddition,reveal thatvery likly there is an extra polar interaction in the transition state of the cross-cycloaddition reactionbetween donor-and acceptor-substituted trifluorostyrenes.

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