In Metal complex [Co(Imidazole)2Cl2] or [Co(Pyrazole)2Cl2 , What are the similar peaks and differentiate peaks. Please help me
Dear Prof. Cristian D.Ene
Thanks for nice information, Unfortunately i can't able to open the journal in our university. I will try see it in Nakamoto book. If you can please send that journals.
Mr. Kumar,
In spite of the complex profile in the solid-state of both the pyrazole and imidazole, they have distinguished vibrational modes as given in the attachment. Furthermore, confirmed by the polarized IR measurements, using the different orientation of the resulting director of the modes in teh 3D space (attachment pages 3 and 4).
The theoretical ab initio IR-spectra have been also shown.
As far as the coordination mode is one and the same (most probably monodentately throuth N(=C)(C(or NH)) and the metal ion is the same, than you cannot expect sifnificant
shifting of the nCN modes (the region is shown as well). But both the ligands can be identified using the region of the out-of-plane vibrations (selected modes are presented).
You can predict theoretically the vibrations of the complexes as well and to compare with those ones, shown of the ligands. But, an eventual polarized measurements unambogously shall proved information about cis-, trans-configuration of the
ligands as well as their mutual disposition within the frame of each of the complexes.
Information about the polarized measurements you may find, following the discussion:
https://www.researchgate.net/post/How_do_I_detect_types_of_bending_vibrations_in_FTIR_analysis
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