名称:
Extreme Magnetic Separation of Geminal Protons in Protonated N,N,N′-Trimethyl-1,8-diaminonaphthalene. A Puzzle of the Fourth Methyl Group
摘要:
Monoprotonated N,N,N-trimethyl-1,8-diaminonaphthalene demonstrates fast exchange of H, and How protons, in which a counterion (BF4- and Br- were tested) participates. The process can be frozen below 185 K revealing a tremendous magnetic separation (up to Delta delta = 11.6 ppm) of these otherwise equal NH protons with the enzyme-like proton transfer and a similar to 7 kcal mol(-1) energetic barrier.