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Ultraviolet/visible spectral assignment of L and its metal complexes [wavelength, nm (cm−1)].
| Compound | Band 1 | Band 2 | Band 3 | Band 4 |
|---|---|---|---|---|
| L | 205(48780) | 238(42017) | – | – |
| Co(L)2Cl2 | 232(43103) | 271(36900) | 526(19011) | 529(18904) |
| Ni(L)2Cl2 | 229(43668) | 256(39063) | 343(29155) | 817(12240) |
| Cu(L)2Cl2 | 229(43668) | 277(36101) | 361(27700) | 364(27473) |
