Electronic and Molecular Structure of Simple 3,3?-Bicyclopropenyls. Photoelectron Spectroscopy and Model Calculations
作者:Jens Spanget-Larsen、Carla De Korswagen、Mirjana Eckeri-Maksie、Rolf Gleiter
DOI:10.1002/hlca.19820650329
日期:1982.5.5
6]dodeca-1, 5-diene (6) are studied by means of photoelectron spectroscopy and model calculations. Through-bond' effects in model compound 1 are analyzed in detail, illustrating a general difficulty with NDO models. Low-energy photoelectron bands of 2–6 can be assigned to ejection of electrons from cyclo-propenyl π- and Walsh-orbitals. Strong ‘through-bond’ coupling leads to splitting of the π-bands in
3,3'-双环丙烯基(1)及其烷基衍生物3,3'-二乙基-3,3'-双环丙烯基(2),双螺[2.0.2.3] nona-1,5-二烯(2)的电子和分子结构3),dispiro [2.0.2.4] deca-1,5-diene(4),dispiro [2.0.2.5] undeca -1、5- diene(5)和dispiro [2.0.2.6] dospira-1,5-通过光电子能谱和模型计算研究了二烯(6)。详细分析了模型化合物1中的“贯穿键”效应,说明了NDO模型的一般困难。可以指定2-6的低能光电子带,以从环丙烯基π-和Walsh射出电子轨道 强大的“键合”耦合导致π波段在1.0-1.5 eV范围内分裂,而沃尔什带的强烈依赖构象的分裂使得可以得出有关优选扭转角的结论。在气相中预测了薄纱构象的偏爱性为2。