[Co(NH_3)_5 Cl]Cl_2 + NaNO_2 rightarrow [Co(NH_3)_5 (ONO)] Cl_2 + NaCl (nitrito

Question

[Co(NH_3)_5 Cl]Cl_2 + NaNO_2 rightarrow [Co(NH_3)_5 (ONO)] Cl_2 + NaCl (nitrito complex) [Co(NH_3)_5(ONO)]Cl_2_(nitrito complex) rightarrow [Co(NH_3)_5 (NO_2)]Cl_2_(nitro complex) 1. Given the above chemical equations, a. Calculate the theoretical yield of nitro complex if you start with 1.000g of the nitrito complex. 2. Spectroscopy: a. What does the abbreviation IR mean: b. What kind of the motions of molecules can IR detect? c. Use the information in the attached IR spectra to explain why the peaks at ~1449cm^-1 and identify the nitrito complex but not the peaks at ~1310 cm^-1 and ~843 cm^-1? d. What are the possible impurities that could be observed in the IR spectra of nitro and nitito complexes?

Explanation / Answer

Many metal nitrates and nitrites are studied by Raman and IR spectra. Impurities like H2O, OH-, Cl- are present in these. advanced techniques of IR have now assigned and distinguished impurity NO3- vibrational bands along with main NO2-.

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