Experimental evidence^a,b.

Entry	F−	Solvent	Time	Yieldc (%)
				2	11	10a	12a	13
1	TBAF	CD3OD	17 h	10	22	10	41	17
2	TBAF	CD3CN/CD3OD (6.5 : 1)	20 min	36	23	21	15	5
3	CsF	CD3CN/CD3OD (6.5 : 1)	5 h	7.8	51.5	4.2	34.9	1.6
4	CsF	CD3CN/CD3OD (17.8 : 1)	5 h	34	38	12	15	1
5	CsF	CD3CN/(CD3)3COD (6.5 : 1)	5 h	31.5	65.9	—	—	0
6	CsF	CD3CN/(CD3)3COD (17.8 : 1)	5 h	65	35	—	—	0

^aAll reactions were carried out on a 0.084 mmol reaction scale of triazolium precursor 1 in 0.75 mL of solvent in a sealed NMR tube. TBAF·3H₂O or CsF (6 equiv.) was used as F⁻ source.

^bTraces of 10b and 12b were detected by ¹⁹F NMR.

^{c 19}F NMR yield.