Nature of the highest occupied molecular orbitals oftrans- andcis-bicyclo[4.1.0]hept-3-enes
作者:Paul G. Gassman、Kata Mlinari?-Majerski、Branka Kova?、Han Chen、David A. Dixon
DOI:10.1002/poc.610080305
日期:1995.3
Photoelectron spectra of trans-bicyclo[4.1.0]hept-3-ene and two methyl derivatives, 1–3, and cis-bicyclo[4.1.0]hept-3-ene and three of its derivatives, 4–7, were measured. Ab initio molecular orbital (MO) and density functional theory (DFT) calculations were performed on these compounds. By combining the results of the experimental and computational trends, it was established that the highest occupied
反式-双环[4.1.0]庚-3-烯和两个甲基衍生物1-3以及顺式-双环[4.1.0]庚-3-烯及其三个衍生物4-7的光电子能谱测量。从头算对这些化合物进行了分子轨道(MO)和密度泛函理论(DFT)计算。通过结合实验和计算趋势的结果,可以确定,最高占据分子轨道(HOMO)为1-3是两个环之间融合处的“扭曲”弯曲σ键,而对于4-7,HOMO为六元环中的π轨道。DFT顺序与光电子光谱所建议的顺序相同,而在MO级别,HOMO始终对应于π轨道。在DFT水平上计算了光电子光谱的强度,并且发现与实验具有良好的定性一致性。