Solvent effects on the nitrogen NMR shielding and nuclear quadrupole coupling constants in 1-methyltriazoles

In this Letter, we use a discrete polarizable solvation model for a systematic analysis of the solvent effects on the nitrogen NMR shielding and nuclear quadrupole coupling constants in a series of 1-methyltriazoles. Fairly accurate predictions are found for the solvent shifts of the nitrogen NMR shielding constants. The analysis of the relative half-height widths of the resonance signal predicted in either vacuum or aqueous solution implies that the spin relaxation time for the pyridine- and pyrrole-type nitrogen atoms possess similar magnitudes in vacuum whereas they are different in aqueous solution. (C) 2008 Elsevier B.V. All rights reserved.