Reaction of certain ring-fused gem-dibromocyclopropanes with methyllithium affords syn-cyclopropylidene dimers such as 2 which contain converging and potentially co-ordinating groups. Cyclofunctionalisation of the double bonds within these latter compounds allows the "angle-of-bite" between the co-ordinating groups to be "tuned" such that, under electrospray conditions in the mass spectrometer, derivative 7 forms a 1:1:1 complex with, for example, D-ribose and sodium ion.
某些环状二
溴环丙烷与
甲基锂反应,生成含有会聚基团和潜在配位基团的顺式环丙亚基二聚体,如2。通过这些后一类化合物中的双键的环化作用,可以“调整”配位基团之间的“咬合角”,从而在质谱仪的电喷雾条件下,使衍
生物7与
D-核糖和
钠离子等形成1:1:1的复合物。