Characterization of the tautometric equilibrium of triazolium ylids by NMR spectroscopy G. Surpateanu, NC Lungu, N Avarvari, A Lablache-Combier, P Grandclaudon and A Couture J. Chim. Phys., 91 (1994) 1648-1657 Published online: 29 May 2017 DOI: 10.1051/jcp/1994911648