1 underwent oligomerization to give its higher homologues, and in CH3CN containing a catalytic amount of TCNE both 1 and 2 were polymerized to give the corresponding polymers almost quantitatively, whereas the sila analogue 3 was stable under these conditions. All compounds 1, 2 and 3 cycloadded to 2,3-dichloro-5,6-dicyano-1,4-benzoquinone to give the corresponding 1 : 1 adducts in a [2 + 6] manner
制备了全甲基化的3,4,7,8-四甲基环辛-1,5-二炔(1)和3,4-二
硅-7,8-二甲基环辛-1,5-二炔(2)。比较了1和2的光电子能谱与它们的tetrasila类似物3的能谱。第一电离能以3 > 2 > 1的顺序减小。观察到1-
四氰基乙烯(TCNE),2- TCNE和3- TCNE配合物的电荷转移光谱。在CH 2中,含有TCNE 1的Cl 2进行低聚反应得到更高的同系物;在CH 3中,含有催化量的TCNE 1和2的CN均被聚合,几乎定量地得到相应的聚合物,而sila类似物3在这些条件下是稳定的。将所有化合物1、2和3环化成2,3-二
氯-5,6-二
氰基-1,4-苯醌,以[2 + 6]方式得到相应的1:1加合物。