The spin delocalization substituent parameters δT 3: The spin-delocalizing abilities of the acetyl and trimethylsilyl groups synthesis of four substituted trifluorostyrenes

Acta Chimica Sinica ›› 1989, Vol. 47 ›› Issue (3): 253-257. Previous Articles Next Articles

Original Articles

自旋离域参数δT之研究 3: 四种取代α,β,β-三氟苯乙烯的合成和环化二聚反应动力学参数的测定

张毓凰;汪大莘;计国桢;蒋锡夔

中国科学院上海有机化学研究所

发布日期:1989-03-15

The spin delocalization substituent parameters δT 3: The spin-delocalizing abilities of the acetyl and trimethylsilyl groups synthesis of four substituted trifluorostyrenes

ZHANG YUHUANG;WANG DASHEN;JI GUOZHEN;JIANG XIKUI

Published:1989-03-15

Abstract

Four substituted a,b,b-trifluorostyrenes (TFS) were prepared The rate constants of the thermal cyclodimerization of two of them were measured at 120-160? Their polar parameters were calculated from the 19F NMR chem. shifts. The spin delocalization substituent parameters of p-trimethylsilyl and p-acetyl groups are 0.29 and 0.50, resp.

Key words: REACTION KINETICS, CHEMICAL SHIFT, FLUOROHYDROCARBON, REACTION RATE CONSTANT, STYRENE P, F19 NMR SPECTROMETRY, CYCLOPOLYMERIZATION

CLC Number:

O643

Cite this article

ZHANG YUHUANG;WANG DASHEN;JI GUOZHEN;JIANG XIKUI. The spin delocalization substituent parameters δT 3: The spin-delocalizing abilities of the acetyl and trimethylsilyl groups synthesis of four substituted trifluorostyrenes[J]. Acta Chimica Sinica, 1989, 47(3): 253-257.

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自旋离域参数δT之研究 3: 四种取代α,β,β-三氟苯乙烯的合成和环化二聚反应动力学参数的测定

The spin delocalization substituent parameters δT 3: The spin-delocalizing abilities of the acetyl and trimethylsilyl groups synthesis of four substituted trifluorostyrenes

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