Comparision Of Donation Strength Of Primary Amides With Tcp Using Association Constant By Ftir Spectrophotometer

Comparison of donation strength of primary amides with TCP using association constant by FTIR spectrophotometer rnAmin Abdullahi rnAddis Ababa University, 2018 rnThe study of amides structure is fundamental for modeling and predicting the behavior of larger molecules, such as proteins which plays essential roles in biological processes, functioning as structural supporters, catalysts and so on. Charge-transfer complexes are associations of donor (electron-rich) molecules with acceptor (electron-deficient) molecules which exhibit absorption. The charge-transfer complexes of the donor of some primary amides with the acceptor 2, 4, 6-tricholorophenol (TCP) studied by infrared spectroscopy in acetonitrile at room temperature. Equal masses of (1:1) donor (amides) and acceptor (TCP) solutions were prepared for FTIR analysis. The results indicate that the formation of a CT complex are depend on a substituent attached to amide functional group that more electron donating group comparatively high association constant. The physical parameters of the CT complex were evaluated by the Benesi–Hildebrand equation and results are discussed in terms of the formation constant, molar extinction coefficient and standard free energy. The comparison of the formation constant of the amide complex indicates that (KCT) formed was dependent upon the nature of the electron donor.

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