9-Methylenetricyclo[4.3.1.0]deca-2,4,7-triene (3a) and its derivatives possessing electron releasing group such as bis(dimethylamino)- and bis(methylthio)-groups at the exo-methylene carbon atom (3b and 3c) were synthesized from bicyclo[4.3.1]decatetraenyl anion (2). It has been shown that the closed norcaradiene tautomers (3a, 3b and 3c) are preferable to the opened nonafulvene tautomers (4a, 4b, and 4c).
                                    9-亚甲基
三环[4.3.1.0]癸-2,4,7-
三烯(3a)及其衍
生物(3b 和 3c)是由双环[4.3.1]癸四烯阴离子(2)合成的,这些衍
生物在外亚甲基碳原子上具有双(二甲基
氨基)-和双(甲
硫基)-电子释放基团。研究表明,封闭的壬二烯同系物(3a、3b 和 3c)优于开放的
壬烯同系物(4a、4b 和 4c)。