Question

The IUPAC name for the complex $\left[Co{\left(N{H}_3\right)}_5\left(N{O}_2\right)\right]C{l}_2$ is:

• A. Nitrito $-$ N $-$ pentaammine cobalt ( III ) chloride.
• B. Nitrito $-$ N $-$ pentaammine cobalt ( II ) chloride.
• C. Pentaammine nitrito $-$ N $-$ cobalt ( II ) chloride.
• D. Pentaammine nitrito $-$ N $-$ cobalt ( III ) chloride.

Answer 1

The correct option is D Pentaammine nitrito $-$ N $-$ cobalt ( III ) chloride.

Oxidation number of $Co$ $x-1=2\to x=3$.

Nitrogen is donating its lone pairs in the given compound.

The IUPAC name is pentaamminenitrito-N-cobalt(III) chloride.

Hence,option D is correct.