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
已经合成了由两个乙醇(4),一个乙醇和一个丙烷(5)和两个丙烷桥(6)在2,6-和3,5-位桥接的三个1,4-二甲基亚环己烷。两个外环亚甲基的相互作用已通过He(I)光电子(PE)光谱进行了研究。与母体1,4-二甲基亚环己烷(7)(0.7 eV)相比,它显示出4和5的能量差(0.8 eV)稍大。PE光谱的解释是基于与相关系统的PE数据的比较以及对4-6的半经验计算的结果。