IUPAC name of
is

Moderate

A

di (ethane – 1, 2 diammine) cobalt (III) – µ – amido – µ hydroxo di (ethane – 1, 2 diammine) cobalt (III) Sulphate
B

bis (ethane – 1, 2 diammine) cobalt (III) – µ – imido – µ – hydroxo bis (ethane – 1, 2 diammine) cobalt (III) Sulphate
C

bis (ethane – 1, 2 diammine) cobalt (III) – µ – amido – µ – hydroxo – bis (ethane – 1, 2 diammine) cobalt (III) Sulphate
D

bis (ethane – 1, 2 diammine) cobalt (III) – µ – imido – µ – hydrido – bis (ethane – 1, 2 diammine) cobalt (III) Sulphate

Solution

en . . . ethane 1, 2-diamine
the bridge ligands involved are ${NH}_{2}^{-}$ . . . amido
OH^- - hydroxo (or) hydroxido
oxidation state of cobalt is “+3”.
Total negative charge = -6 ( ${NH}_{2}^{-}, {OH}^{-} and two {SO}_{4}^{- 2}$ )
Thus each cobalt will have “+3” charge. Name ‘en’ first then name the metal ion with its oxidation state in parenthesise followed by bridge ligands, followed by ‘en’ and finally metal ion once again. The name of counter ion $({SO}_{4}^{- 2})$ should not have any prefix. IUPAC name of the complex.
bis(ethane-1, 2 diamine) cobalt (III) µ-amido-µ-hydroxo bis(ethane-1, 2-diamine) cobalt-(III) sulphate

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