1620660-91-4Relevant academic research and scientific papers
Stable N-phosphanyl acyclic diaminocarbenes
Marchenko, Anatoliy,Koidan, Georgyi,Hurieva, Anastasiya,Kurpiieva, Olena,Vlasenko, Yurii,Rozhenko, Alexander B.,Kostyuk, Aleksandr
, p. 3259 - 3270 (2015/04/27)
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°. Structural changes near the carbenic carbon atom, such as substitution of phenyl with mesityl, phosphanyl with selenophosphoryl, or the diisopropylamino group with 2,2,6,6-tetramethylpiperidino, rendered them unstable. The PADCs underwent N,C-phosphorus shifts to afford new C-phosphanylformamidines. The deprotonation of PIII N-substituted formamidinium salts afforded a new type of stable acyclic N-phosphanyl-diaminocarbene. The carbenes possess an optimal substitution pattern, deviations from which make them unstable. They transform into C-phosphanylformamidines by a N,C-phosphorus shift, which was studied by quantum chemistry calculations.
Stable N-phosphanyl acyclic diaminocarbenes
Marchenko, Anatoliy,Koidan, Georgyi,Hurieva, Anastasiya,Kurpiieva, Olena,Vlasenko, Yurii,Rozhenko, Alexander B.,Kostyuk, Aleksandr
, p. 3259 - 3270 (2014/07/22)
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°. Structural changes near the carbenic carbon atom, such as substitution of phenyl with mesityl, phosphanyl with selenophosphoryl, or the diisopropylamino group with 2,2,6,6-tetramethylpiperidino, rendered them unstable. The PADCs underwent N,C-phosphorus shifts to afford new C-phosphanylformamidines. The deprotonation of PIII N-substituted formamidinium salts afforded a new type of stable acyclic N-phosphanyl-diaminocarbene. The carbenes possess an optimal substitution pattern, deviations from which make them unstable. They transform into C-phosphanylformamidines by a N,C-phosphorus shift, which was studied by quantum chemistry calculations. Copyright
