Observation of thermal tautomerism of thermochromic salicylideneaniline derivatives in the solid state by 15N CPMAS NMR down to cryogenic temperatures

Observation and characterization by 15N

Observation and characterization by 15N CPMAS NMR of a double proton transfer in cyclic dimers of 15N, 15N′-di(4-bromophenyl)-formamidine in the solid state

✍ Ferdinand Männle; Iwona Wawer; Hans-Heinrich Limbach 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 378 KB

Using dynamic 15N CPMAS NMR spectroscopy a novel double proton transfer was detected in the cyclic hydrogen bonded dimers of polycrystalline tSN,ZSN'-di-(4-bromophenyl)-formamidine. Rate constants of this process, which is degenerate within the margin of error, were obtained by lineshape (kl2 = 10 6