Table 4. The calculated optical transition energies (nm) and their corresponding oscillator strengths (f) (ev) for 1 and 2 .

λ	f	E	Transition	Type
1
286	0.03	4.33	HOMO-2 to LUMO	LMTC
280	0.01	4.42	HOMO-3 to LUMO	LMTC
2
507	0.009	2.44	HOMO-4 to LUMO	LMTC
443	0.08	4.03	HOMO-5 to LUMO	LMTC
244	0.07	5.81	HOMO-2 to LUMO+1	LLTC