Competition between Reaction and Intramolecular Energy Redistribution in Solution: Observation and Nature of Nonstatistical Dynamics in the Ozonolysis of Vinyl Ethers
作者:Larisa Mae M. Quijano、Daniel A. Singleton
DOI:10.1021/ja2043497
日期:2011.9.7
Experimental product ratios in ozonolyses of alkyl vinyl ethers in solution do not fit with expectations based on statistical rate theories. The selectivity among cleavage pathways increases with the size of the alkyl group but to an extent that is far less than RRKM theory would predict. Trajectory studies account for the observed selectivities and support a mechanism involving a competition between
溶液中烷基乙烯基醚臭氧分解的实验产物比率不符合基于统计速率理论的预期。裂解途径之间的选择性随着烷基的大小而增加,但其程度远低于 RRKM 理论预测的程度。轨迹研究解释了观察到的选择性,并支持涉及初级臭氧化物裂解和分子内振动能量重新分布之间竞争的机制。提出了一个统计模型,假设 RRKM 理论适用于主要臭氧化物的分子子集,允许从观察到的产物比率估计臭氧化物的能量损失率。