PHOTOACOUSTIC CALORIMETRY OF CYCLOHEPTENE DERIVATIVES - RELAXED TRIPLET ENERGIES OF 1-PHENYLCYCLOHEPTENE AND 1,3-CYCLOHEPTADIENE AND THE ENERGETICS OF GROUND-STATE CIS-TRANS ISOMERIZATION

被引：16

作者：

BRENNAN, CM ^{[1
]}

CALDWELL, RA ^{[1
]}

机构：

[1] UNIV TEXAS,RICHARDSON,TX 75080

来源：

PHOTOCHEMISTRY AND PHOTOBIOLOGY | 1991年 / 53卷 / 02期

关键词：

D O I：

10.1111/j.1751-1097.1991.tb03918.x

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The heat of isomerization E(ct) of cis-1-phenycycloheptene (c-PC7) to its highly strained trans isomer has been determined by a combination of a quantitative study of acid-catalyzed trapping of the trans isomer with time-resolved photoacoustic calorimetry. The relaxed triplet energy has been determined for PC7 and for cis,cis-1,3-cycloheptadiene. The triplet energies are in line with previous studies of other alkenes but the E(ct) value is significantly higher than that calculated by molecular mechanics calculations for cycloheptene. The significance of the results for cis-trans thermal isomerization is discussed.

引用

页码：165 / 168

页数：4

共 33 条

[1] CONFORMATIONAL-ANALYSIS .84. STUDY OF STRUCTURES AND ENERGIES OF SOME ALKENES AND CYCLOALKENES BY FORCE FIELD METHOD [J].