Abstract
The 15N- 14N heteronuclear spin pair present in the polycrystalline compound 5-methyl-2-diazobenzenesulphonic acid hydrochloride singly labelled with 15N at either the α- or the β-position is investigated by solid-state nuclear magnetic resonance. The 15N spectrum is obtained both under static and spinning conditions. Unusually well resolved fine structure is observed in both cases and, in particular, the static spectra allow a direct and straightforward measurement of the 15N- 14N internuclear dipolar coupling in addition to values of the principal components of the shielding tensors for 15N labelling (at either the α- or the β-positions of the diazo moiety) and their orientation relative to a molecular frame. We also present a preliminary theoretical discussion concerning the origin of the observed spinning frequency dependence of the sideband fine structure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have