Antibacterial Activity of 2-Picolyl-polypyridyl-Based Ruthenium (II/III) Complexes on Non-Drug-Resistant and Drug-Resistant Bacteria

Table 2

Complexes and their associated electronic spectroscopy bands.

Transitions	[Ru2(2BUT)(DMF)2(DPA)](BH4)4(3) (nm) (ε×10^4(L mol^−1 cm^−1)) (0.32 mM)	[Ru2(2BUT)(Cl)6] (4) (nm) (ε×10^4(L mol^−1 cm^−1)) (0.62 mM)
π-π and CT	<262 [1.009], 345 [0.5469]	<297 [5.240]
d-d	462 [0.1626], 532 [0.1325]	412 [0.1356], 604 [0.0750]

CT: charge transfer bands. The electronic spectral data indicated the complexes are low spin Ru(III) d⁵ and Ru(II) d⁶ complexes. Also, the molar absorptivity of the complexes’ bands demonstrates that they are their true assigned transitions.