The nuclear magnetic resonance spectra of a rigid Amdash;Bmdash;Amdash;Bmdash;A system of spinhyphen;frac12; nuclei are calculated taking into account firsthyphen; and secondhyphen;nearesthyphen;neighboring dipolemdash;dipole interactions. Both the cases of a linear and nonlinear nuclear arrangement are treated and are shown to yield a distinct fine structure. The results are applied to a study of the H2F3minus;ion in KH2F3and NaH2F3, and comparisons with experiment are made for both proton and fluorine resonances. Though the Fmiddot;middot;middot;F distances are very short and the hydrogen bonds in this crystal approach in stability those in the bifluoride ion, the obtained data show that the hydrogen atoms are unsymmetrically located.
展开▼
