Table 2. Summary of ¹⁹F NMR properties for compounds 1a and 2a in CD₃CN, H₂O, and FBS solutions.

	CD3CN			H2O			FBS
	1a		2a	1a		2a	1a		2a
δ (ppm) a	59.4	52.6	55.9	41.6	36.3	59.2	40.7	35.5	59.0
Δδ (ppm)	+40.9 b	+36.2 b	–13.6 b	+28.3 c	+24.6 c	–12.0 c	+28.8 c	+25.1 c	–11.7 c
CT (ppm per °C)	+0.67(2) b	+0.59(2) b	–0.24(2) b	+0.52(1) c	+0.45(1) c	–0.21(1) c	+0.52(1) c	+0.45(1) c	–0.21(1) c
FWHM (Hz) d	287	270	105	282	243	868	251	241	872
|CT|/FWHM (per °C)	1.10	1.03	1.07	0.87	0.87	0.11	0.97	0.88	0.11

^aReferenced to corresponding Zn^II analogues at 40 °C.

^bObtained from the temperature range –22–40 °C.

^cObtained from the temperature range 4–61 °C.

^dObtained from data at 40 °C.