作者:Anatoliy Marchenko、Georgyi Koidan、Anastasiya Hurieva、Olena Kurpiieva、Yurii Vlasenko、Alexander B. Rozhenko、Aleksandr Kostyuk
DOI:10.1002/ejic.201402166
日期:2014.7
The deprotonation of N-di-tert-butylphosphanyl-N-aryl-N′-diisopropylformamidinium salts led to a new type of stable acyclic N-phosphanyl-diaminocarbene (PADC). Carbenes 8a–8d were separated as single compounds. The molecular structure of 8c was determined by X-ray diffraction analysis. The PADC 8 possess an optimal substitution pattern at the nitrogen atoms, and the N–Ccarbene–N bond angle is 120.7°
N-二叔丁基膦酰基-N-芳基-N'-二异丙基甲脒盐的去质子化导致了一种新型稳定的无环N-膦酰基-二氨基卡宾(PADC)。卡宾 8a-8d 被分离为单一化合物。8c的分子结构由X射线衍射分析确定。PADC 8 在氮原子处具有最佳取代模式,N-Ccarbene-N 键角为 120.7°。碳烯碳原子附近的结构变化,例如苯基被甲基取代,磷酰基被硒代磷酰基取代,或二异丙基氨基被 2,2,6,6-四甲基哌啶基取代,使它们变得不稳定。PADCs 经历了 N,C-磷转变,以提供新的 C-膦酰甲脒。