1. Ligand Field Parameters, Racah Parameters, and Octahedral Distortion Parameters in Co^III and Cr^III Complexes along with the Lifetimes of Their Lowest Electronically Excited States ,,,,,

Complex	10 Dq†/cm–1	C†/cm–1	τ(3T1)/ns	Σ/°	Complex	10 Dq/cm–1	τ(2E)/μs	Σ/°
[Co(phtpy)2]3+	26,650	4050	2.6	65	[Cr(tpy)2]3+	20,390	30	104
[Co(bpy)3]3+	25,900	3730	5.0	47	[Cr(bpy)3]3+	23,300	63	67
[Co(dqp)2]3+	25,400	3700	8.3	13	[Cr(dqp)2]3+	24,900	1200	29

^a10 Dq and Racah parameter C values for [Co­(phtpy)₂]³⁺ and [Co­(dqp)₂]³⁺ were approximated using the Tanabe–Sugano formalism: ΔE(³T₁–¹A₁) = 10 Dq – 3C, ΔE (¹T₁–¹A₁) = 10 Dq – C (experimental values were extracted from the data in Figure ).

^bAcetonitrile solution, room temperature.

^cAqueous solution, room temperature.