Table 1. Time constants (τ), rate constants (k), and driving forces (−∆G°) for 1 to 3 CR.

τ and k (= 1/τ) from global fits of visible TA spectra. ∆G^o CPET-CR from DFT and constrained DFT computations (17). Uncertainties for k and approximate uncertainties for ∆G^o CPET-CR are shown in parentheses.

Compound	Solvent	τ (ps)	k × 1010 (s−1)	∆G° (eV)
1	CH2CI2	755	0.13(1)	−2.54(5)
	n-BuCN	92	1.1(1)	−2.48(5)
	DMF	22	4.6(1)	−2.46(5)
2	CH2CI2	578	0.17(2)	−2.53(5)
	n-BuCN	72	1.4(1)	−2.43(5)
	DMF	20	5.0(1)	−2.41(5)
3	CH2CI2	268	0.37(3)	−2.36(5)
	DMF	16	6.2(1)	−2.29(5)