Abstract:
Mn(II), Co(II), Zn(II) and Cd(II) carbonates, respectively, were achieved by a new chemical procedure under the reaction of aqueous solutions of metal ions (MnCl2 Co(NO3)2, Zn(NO3)2 or CdCl2), potassium iodide and urea with molar ratio 1:2:10, respectively, at ~ 90 oC for 3 hrs. The infrared spectra of the results indicate absence of the essential bands of urea, but existed of the characteristic bands of ionic carbonate, CO32–. An important chemical mechanisms discussed the preparation of Mn(II), Co(II), Zn(II) and Cd(II) carbonate compounds were suggested.
Keywords: carbonate CO32–, infrared spectra, transition metals, potassium iodide, urea.