Fig. 11: Investigating proposed elementary reactions with addition of chloride ions and pyrrolidine.

a–c Effect of pyrrolidine and chloride ions on structures 7. d–f Effect of pyrrolidine and chloride ions on structures 5. g Pyrrolidine and chloride ions have no effect on 6a. Conditions: 5a, 5c, 6a, 7a, 7g (0.01 M), Bu4NCl (0.025 M) if added, pyrrolidine (0.05-0.15 M) if added, CDCl3, RT (296 K).