Question

IUPAC name for the complex $\left[Cu\right(N{H}_3{)}_4]S{O}_4$ is:

• A. cupramonium sulphate
• B. copper sulphate tetraamonia
• C. tetrammine copper (II) sulphate
• D. copper amonium (IV) sulphate

Answer 1

The correct option is C tetrammine copper (II) sulphate

Since 4 amino groups are present, it will be called as tetrammine.
Since copper(II) is the central metal, it will be tetrammine copper(II). Note that we can determine the oxidation number of copper by charge balance.
Now finally since sulphate is the counter ion, it's full name will be tetrammine copper(II) sulphate.
C is the correct answer.