R. Gleiter, G. Jähne, G. Müller
Feb 5, 1986
Citations
0
Influential Citations
9
Citations
Journal
Helvetica Chimica Acta
Abstract
The synthesis of 1,5-dimethyltricyclo[3.3.0.02,8]octane-3,7-dione (2), 1,5-dimethyltetracyclo[3.3.0.02,804,6]-octane-3,7-dione (3), the corresponding dienes 5 and 6 as well as the mixed enones 13–15 is reported. Using He(I) photoelectron spectroscopy (PE) as a tool, a considerable interaction between the n orbitals on the O-atoms and the σ frame in 2 and 3 as well as of the double bonds in 5 and 6 and the σ frame is found. These interactions are also traced back by the electronic absorption spectra of these compounds. The molecular structures of 2 and 3 have been investigated by X-ray analysis.