Fast degenerate double proton transfer in the solid state between two indazolinone tautomers
作者:Marta Pérez-Torralba、Concepción López、Carlos Pérez-Medina、Rosa M. Claramunt、Elena Pinilla、M. Rosario Torres、Ibon Alkorta、José Elguero
DOI:10.1039/c0ce00249f
日期:——
2H-indazolin-3-one and 3-hydroxy-4,6-difluoro-1H-indazole linked by two hydrogen bonds presents a very fast intermolecular double proton transfer in the solid state (ISSPT). The combined use of crystallography, solid state NMR and DFT [B3LYP/6-311++G(d,p)] calculations supports this interesting observation and allows us to estimate a barrier of about 20 kJ mol−1.
中性二聚体由 4,6-二氟-1 H,2 H-吲唑啉-3-一 和 3-羟基-4,6-二氟-1 H-吲唑 由两个链接 氢键在固态(ISSPT)中呈现出非常快的分子间双质子转移。晶体学,固态NMR和DFT [B3LYP / 6-311 ++ G(d,p)]计算的组合使用支持这一有趣的观察,并允许我们估计约20 kJ mol -1的势垒。