Interaction between Oxygen Lone-Pair Orbitals of Ether and α,β-Unsaturated Ketone Functions in 3,5,6-Trimethylidene-7-oxabicyclo[2.2.1]heptan-2-one and 3,6-Dimethylidene-7-oxabicyclo[2.2.1]heptane-2,5-dione: A PE-Spectroscopic Investigation
作者:Karl Röser、Pierre-Alain Carrupt、Pierre Vogel、Evi Honegger、Edgar Heilbronner
DOI:10.1002/hlca.19900730102
日期:1990.1.31
and 4 have been recorded. Comparison with the PE data of related systems, and with the result of ab initio STO-3G calculations, confirm the existence of significant through-bond interactions between the oxygen lone-pair orbitals n(CO) of the carbonyl functions and n(O) of the O(7) ether bridge.
2,3,5,6-四亚甲基-7-氧杂双环[2.2.1]庚烷的受控臭氧分解(3),得到3,5,6-三亚甲基-7-氧杂双环[2.2.1]庚烷-2-一(2) 。2的臭氧分解得到3,5-二甲基-7-氧杂双环[2.2.1]庚烷-2,6-二酮(3)和3,6-二甲基-7-氧杂双环[2.2.1]的1:1混合物]庚烷-2,5-二酮(4)。已记录2和4的He(Iα)光电子(PE)光谱。与相关系统的PE数据比较以及从头算起STO-3G的计算结果,证实了羰基官能团的氧孤对轨道n(CO)和n(O)之间存在显着的键间相互作用O(7)醚桥的结构。