Multinuclear NMR study of some mesoionic 3-phenyl-1-thia-2,3,4-triazol-3-ium-5-ylmethanides with various exocyclic groups
Abstract
Six mesoionic 3-phenyl-1-thia-2,3,4-triazol-3-ium-5-ylmethanides (3,5–9) have been synthesized for the first time. 13C, 14N and 15N NMR data have been collected and interpreted in terms of molecular structure. The 1J13C–13C coupling constants of the ring–exocyclic group bond have been determined and are discussed.