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Aqueous solutions of thiocyanates of divalent cations, Cd, Hg, Ni, Mn, Fe, Zn, and Co, were studied by IR spectrometry. It was found that Cd(II), Hg(II), Ni(II), and Fe(II) coordinate NCS− in the thiocyanate mode, Zn(II) coordination is in the isothiocyanate mode, and Co(II) and Mn(II) change the mode of coordination depending on the KNCS concentration in solution. The UV and visible spectra of solutions...
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