Table 2.

HOMO–LUMO calculated values in eV for compounds 6–8 (B3LYP/6-31G(d,p)).

	HOMO (eV)	LUMO (eV)
6	−5.32 eV	−3.13 eV
7	−5.15 eV	−3.38 eV
8	−5.15 eV	−3.60 eV