the tautomeric equilibria, i.e., on what nitrogen atom is the proton, was determined in the solid state and in solution. The crystal structure of N[[5-[(phenylamino)methylene]-1,3-cyclopentadien-1-yl]methylene]pyrrole-1-amine (3) has been determined by X-ray analysis. In solution, both N-H and C-H tautomers were observed and their structures assigned by NMR spectroscopy. Particularly useful is the
为了研究能够维持分子内质子转移的系统,我们准备了一系列六种
氨基
富勒烯醛
亚胺,包括几种标记有(15)N和(2)H的
氨基
亚胺。这些化合物通过氢键(1h)J((15)N-(1)H)和(2h)J((15)N-(15)N)显示偶联常数。在固态和溶液中确定互变异构平衡的位置,即质子在哪个氮原子上。N [[5-[(苯
氨基)亚甲基] -1,3-
环戊二烯-1-基]亚甲基]
吡咯-1-胺(3)的晶体结构已经通过X射线分析确定。在溶液中,观察到NH和CH互变异构体,并通过NMR光谱确定其结构。特别有用的是(1)J((15)N-(1)H)耦合常数的值。