Cyclamdione and Their Cu II Complexes

The vCO vibrations are observed in the ligand of cyclamdione at 1,672 and 1,562 cm By complexing, these bands collapse in one asymmetric band at 1,588 cm pointing out the equivalence of the two CO groups in the complex. 

Dinaphthalenic Ni(ll) and Cu(ll) Azamacrocycle Complexes Methyl and Phenyl Substituted 

The energy difference of bands at 644, 577 and 409 cm in Ni and at 630, 552 and 420 cm in the Cu complex, indicates that the corresponding vibrations belong to modes close related to the coordination site. That is not the case for bands at 606, 473 and 347 cm in Ni and at 607, 475 and 342 cm in the Cu complex, which correspond to ring modes far from the coordination site. 

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Diaz, G., R.E. Clavijo, M.M. Campos-VaUette, M. Saavedra, S. Diez, L. Lopez, and R. Munoz (1997). Specular reflectance infrared spectra of the macrocycles cyclam and cyclamdione and their Cu(II) complexes deposited onto a smooth copper surface. Vib. Spectrosc. 15, 201. 

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