Use of Gas-Phase <sup>1</sup>H NMR to Determine the Kinetics of Unimolecular Rearrangement of 2,2-Dichloro-1-methylenecyclopropane and the Bimolecular Dimerization of (Dichloromethylene)cyclopropane
作者:Alexander B. Shtarov、Paul J. Krusic、Bruce E. Smart、William R. Dolbier
DOI:10.1021/jo025530n
日期:2002.5.1
Gas-phase (1)H NMR analysis has been applied to investigate the kinetics of the unimolecular rearrangement of 2,2-dichloro-1-methylenecyclopropane (1) to (dichloromethylene)cyclopropane (2) [k(1) = 7.9 x 10(12) exp(-34.4 +/- 0.6 kcal mol(-1)/RT)], as well as for the subsequent second-order dimerization of 2 [k(2) = 2.4 x 10(6) exp(-18.5 +/- 1.1 kcal mol(-1)/RT)] to form 7,7,8,8-tetrachlorodispiro[2
气相(1)H NMR分析已用于研究2,2-二氯-1-亚甲基环丙烷(1)到(二氯亚甲基)环丙烷(2)的单分子重排的动力学[k(1)= 7.9 x 10 (12)exp(-34.4 +/- 0.6 kcal mol(-1)/ RT)],以及随后的2的二阶二聚化[k(2)= 2.4 x 10(6)exp(-18.5) +/- 1.1 kcal mol(-1)/ RT)]形成7,7,8,8-四氯二螺[2.0.2.2]辛烷(3)