Compound
t1/2 at 20 °C (UV-vis) (min) t1/2 at 20 °C (NMR) (min) ΔG at 20 °C (kJ/mol) PSS365 ratios at 4 °C (metastable : stable)
Zn2a25 11.6 88.6 ± 0.9 24 : 76
Zn2b25 5.3 86.7 ± 0.7 37 : 63
Zn3a 11.0 12.5 88.5 ± 1.5 25 : 75
Zn3b 6.8 9.7 87.3 ± 1.9 24 : 76
Zn3c 5.2 6.2 86.6 ± 0.3 23 : 77