(a)
(b)
(c)
Figure 4: Recorded and calculated IR spectra of [RuCl3(hqn)NO] (a), [RuCl3(2mqn)NO] (b), and [RuCl3(2cqn)NO] (c) complexes in the 2000–1400 cm−1 region (blue: experimental; black: calculated).