2,2'-bipyridine and a novel methylenating agent. Reversible deprotonations proceed via 2 to lead to carbene 3, a formal 1:1 complex between singlet carbon and 2,2'-bipyridine which is stable in solution and can be trapped. For 1 and 2, unusual hybridizations of the bridging C atom were found experimentally.
由
2,2'-联吡啶和新型亚甲基化剂合成1,首次实现了质子化
咪唑鎓体系的结构元素。可逆的去质子通过2进行,生成卡宾3,卡宾3是单线态碳与
2,2'-联吡啶之间的正式1:1络合物,在溶液中稳定并且可以被捕获。对于1和2,通过实验发现了桥接C原子的异常杂交。