The difference in G # for TS1-2d and TS11-3d was < 1.0 kcal/mol, therefore, 1d could be expected to go through both reaction pathways to afford the two regioisomeric triazoles (6d and 7d). This is an interesting result, since the experimental data demonstrated that the 1d propargylic azide outlines the inflection point in the two mechanisms.