PROTON RESONANCE SPECTROSCOPY OF UNSATURATED RING SYSTEMS .13. KINETICS OF A NORCARADIENE-CYCLOHEPTATRIENE EQUILIBRIUM

被引：76
作者：
GORLITZ, M
GUNTHER, H
机构：
来源：
TETRAHEDRON | 1969年 / 25卷 / 18期
关键词：
D O I：
10.1016/S0040-4020(01)82989-6
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
The existence of a fast, reversible norcaradiene-cycloheptatriene equilibrium has been demonstrated for 7,7-dicarbometboxycycloheptatriene, synthesized by Berson et al. Measurements of signal intensities and of chemical shifts yield ΔH° = 160 cal/mole and ΔS° = 3 e.u. for the reaction norcaradiene → cycloheptatriene. From lineshape changes between -70 and -140° an activation energy of Ea = 7 kcal/mole and a frequency factor of log A = 11·9 are deduced. © 1969.
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页码：4467 / &
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