Abstract

Khlood Abou-Melha^1*, Moamen S. Refat^2,3, and Khaled M. Elsabawy^2,4

DOI : http://dx.doi.org/10.13005/ojc/310336

In the present study, the composition and structure of Cu(II), Ni(II) and Zn(II) compounds resulted from the chemical reactions of copper(II), nickel(II) and zinc(II) bromide salts with carbamide  in aqueous media at 95 ^oC have been investigated, using IR, electron spin resonance ESR and x-ray powder diffraction spectroscopy as well as thermal analysis TG/DTG/DSC. The Cu₂(OH)₃Br, [Ni₂(NCO)₂(H₂O)₂(Br)₂], and ZnCO₃.xH₂O compounds were achieved by a novel synthetic route through with a low cost precursor like carbamide. The infrared spectra of the results indicate absence of the individual bands of carbamide, but exhibited of the distinguished bands of hydroxyl, isocyanate, NCO, and ionic carbonate, CO₃^2– for Cu(II), Ni(II) and Zn(II) compounds, respectively. Visualized investigations were performed to confirm crystal structure, validity and stability of the product compounds. A general reaction mechanisms describing the preparation of Cu(II), Ni(II), and Zn(II) compounds were discussed.

carbonate CO32–; Isocyanate ion; Infrared spectra; X-ray; carbamide

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