Research Article

The Spectroscopic and Conductive Properties of Ru(II) Complexes with Potential Anticancer Properties

Table 2

The assignment of the IR vibrations to different bonds in the complexes.

VibrationsComplexAssignment

3600–36251, 2, 3, and 5O–H of carboxylic
1758–17841, 2, 3, and 5C=O [80] of carboxylic
1050–11501, 2, 3, and 5O–C stretches (2-bands)
735–7451, 2, 4, and 5O–H bend (out-of-plane)
32281, 4C–H asymmetric vibration peculiar to pyrazol-1-ly unit
3050–3161AllC–H arene asymmetric vibration
1419 AllCharge transfer Ru–L [81]
C–C
Arene (C–H) stretches
1337All but prominent in complex 2C–N stretches
597Complex 3 that is effect of carbonyl unit being very close to metalCharge transfer
614–642Complexes 1, 2, 3, and 5O–H bend (out-of-plane) of carboxylic unit
300Complexes 1, 2, 3, and 5Peculiar to carboxylic
14774Ru–L charge transfer [82];
C–C; C–N
1419AllRu–L charge transfer [82]; C–C; C–N
700 1, 2, 3Ru–Cl
7512, 4, 5 with pyridine has peculiarRu–N(py)
847 3 Ru–N(phen)
7311, 4Ru–N(pz)
7654, 5 (strong)Ru–N(py) should result from the strong long bond of Ru with mid pyridine unit
797AllRu–C
3161 2, 4, 5 (C–H) antisymmetric stretches (py)
3224 1, 4 (C–H) antisymmetric stretches (pz)
5055Ru–N(py) close to 424–428 assigned to (Ru–S) [80]
300AllBond deformations