Question

The hypothetical complex chlorodiaquatriammine
cobalt (III) chloride can be represented as
(a) [CoCl(NH₃)₃ (H₂O)₂]Cl₂
(b) [Co(NH₃)₃ (H₂O)Cl₃]
(c) [Co(NH₂)₃ (H₂O)₂ Cl]
(d) [Co(NH₃)₃ (H₂O)₃]Cl₃

Answer 1

Answer:

OPTION IS A

Explanation:

In writing IUPAC name for complexes, we write cationic part first and then anionic part. In the name, 'chloro' is present before metal ion. So one  is present in co-ordination sphere. Total 3 chlorines are present, because oxidation state of metal is +3. One is inside co-ordination sphere and remaining two present outside. And co-ordination sphere also consists  1 ammonia molecules, 2 water molecules.

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Answer 2

(a) [CoCl(NH₃)₃ (H₂O)₂]Cl₂

Explanation:

IUPAC name format is such that cation followed by anion. Since chloro is present before metal ion, one chlorine is present in the co-ordination sphere. the other 2 chlorines are outside. Coordination sphere has one ammonia and 2 water molecules as well.

Option A is the answer.