Question

The IUPAC name of \([\mathrm{Co(NH_3)_5Cl}]\mathrm{SO_4}\) is:

• A. Pentaamminechloridocobalt(III) sulphate
• B. Chloropentaamminecobalt(III) sulphate
• C. Pentaamminechlorocobalt(II) sulphate
• D. Amminechlorocobalt(III) sulphate

Hint:

Name ligands first, then metal with oxidation state.

Answer 1

The Correct Option is A

The complex cation is \([\mathrm{Co(NH_3)_5Cl}]^{2+}\) with Co in +3 state.