Photolysis of the Dichlorocyclobutenedione in Rare Gas at 10 K. Infrared Spectral Analysis and <i>ab </i><i>Initio</i> Calculations of Vibrational Frequencies. First Identification of Two New Species (Dichloro-Substituted Bisketene and Dichloropropadienone). Kinetics and Reaction Mechanism
作者:I. Mincu、M. Hillebrand、A. Allouche、M. Cossu、P. Verlaque、J. P. Aycard、J. Pourcin
DOI:10.1021/jp950576o
日期:1996.1.1
decomposed by further irradiation and leads to the formation of carbon monoxide (D), dichlorocyclopropenone (E), and dichloropropadienone (Cl2CCCO) (F), by two concurrent pathways (branching ratios: 93% for E, 7% for F in an argon matrix). Photolysis of E and F by the full light of a mercury lamp (λ > 230 nm) led to the infrared characterization of dichloroacetylene (G), formed via a simple primary
通过FTIR光谱研究了嵌入稀有气体基质中并被过滤宽带光源(λ> 335 nm)照射的3,4-二氯环丁烯-1,2-二酮(A)的光化学。通过从头算起理论振动光谱在MP2 / 6-31G *级别将新的IR吸收带分配给光产物。形成了一种新的高反应性中间体双烯酮,即2,3-二氯-1,3-丁二烯-1,4-二酮(OC C-Cl)2(B);B在C O光谱范围内的对称和反对称振动模式的实验红外波段活动证实了其计算的扭曲结构。乙通过进一步的辐射分解,并通过两个同时发生的途径(分支比率:E,7的分枝率为93%)形成一氧化碳(D),二氯环丙烯酮(E)和二氯丙二烯酮(Cl 2 C C C O)(F)对于氩气矩阵中的F,则为%。汞灯(λ> 230 nm)的全光对E和F的光解作用导致二氯乙炔(G),是通过简单的主离解过程形成的。对积分吸光度与时间的关系的研究使我们能够表征过程的动力学行为并建立反应机理。