Syntheses and PE-Spectroscopic Investigations of 2,6- and 3,5-Bridged 1,4-Dimethylidenecyclohexanes
作者:Teh-Chang Chou、Holger Lange、Rolf Gleiter、Tibor Gögh、Miroslav Kríž、Max H. Pfenninger、Marian Valentíny、Camille Ganter
DOI:10.1002/hlca.19950780809
日期:1995.12.13
Three 1,4-dimethylidenecyclohexanes, bridged in the 2,6- and 3,5-positions by two ethano (4), one ethano and one propano (5), and two propano bridges (6) have been synthesized. The interaction of the two exocyclic methylidene groups has been investigated by He(I) photoelectron (PE) spectroscopy. It revealed a slightly larger energy difference (0.8 eV) for 4 and 5 as compared to the parent 1,4-dime