Table 3: Electronic spectral data (in Nujol) of ligands L1 and L2 and complexes 1 and 2.


Compound ν (cm−1) Tentative assignments

1,10-phenanthroline (L1) 33,898 π–π*
Thymine (L2) 35,087 π–π*
[Cu(L1)2(H2O)2]Cl2 34,246 π–π*
[Cu(L1)2L2H2O]Cl 16,025 2B1g2A1g
15,625 2B1g2B2g
34,246 π–π*
15,060 2B1g2A1g
15,037 2B1g2B2g