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Extreme magnetic separation of geminal protons in protonated N,N,N',-trimethyl-1,8-diaminonaphthalene. A puzzle of the fourth methyl group.
Autorzy
Rok wydania
2013
Czasopismo
Numer woluminu
15
Strony
2194-2197
DOI
10.1021/ol400746u
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Monoprotonated N,N,N'-trimethyl-1,8-diaminonaphthalene demonstrates fast exchange of H(in) and H(out) 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 Δδ = 11.6 ppm) of these otherwise equal NH protons with the enzyme-like proton transfer and a ∼7 kcal mol(-1) energetic barrier.
Adres publiczny
http://dx.doi.org/10.1021/ol400746u
Strona internetowa wydawcy
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