Anisotropic γ-proton coupling and α-, β- and methyl-proton hyperfine coupling tensors in the 2-hexyl radical

J(F,H), J(C,H) and J(H,H) couplings invo

J(F,H), J(C,H) and J(H,H) couplings involving the individual methyl group protons in 1,2,3,4-tetrachloro-5,6,7,8-tetrafluoro-9-methyltriptycene. Evidence of blue-shifting hydrogen bond

✍ I. Czerski; K. Kamieńska-Trela; W. Koźmiński; T. Ratajczyk; S. Szymański; J. Wój 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 154 KB

## Abstract 1,2,3,4‐tetrachloro‐5,6,7,8‐tetrafluoro‐9‐methyltriptycene was studied in NMR spectra at low temperatures where the methyl group dynamics is frozen. Values of ^5^__J__(^19^F,^1^H), ^1^__J__(^13^C,^1^H), and ^2^__J__(^1^H,^1^H) for the individual methyl protons were measured. They are in