The IUPAC name for the complex $ [\text{Co}(\text{ONO})(\text{NH}_3)_5]\text{Cl}_2 $ is

Question

5.33 gram of $CrCl_3 \cdot 6H_2O$ (1:3 electrolyte) is passed through cation exchanger. The resulting solution is then treated with an excess of $AgNO_3$, leading to formation of 8.61 gran of precipitate. Calculate :
$\frac{\text{number of moles of complex reacted}}{\text{number of moles of AgCl precipitated}} \times 100$

Answer 1

The complex $ [\text{Co}(\text{ONO})(\text{NH}_3)_5]\text{Cl}_2 $ comprises:
$ \text{ONO} $: A nitrito ligand coordinated through oxygen (nitrito-O),
$ \text{NH}_3 $: Five neutral ammine ligands,
$ \text{Cl}_2 $: Two chloride counter ions.
The oxidation state of cobalt is calculated as follows:
\[\text{Co} + 5(0) + (-1) + 2(-1) = 0 \implies \text{Co} = +3.\] Thus, the IUPAC name is: \[\boxed{\text{Pentaammine-nitrito-O-cobalt(III) chloride}}.\]

Column-I (Complex compound)	Column-II ($\Delta_0$ (CFSE) $\text{cm}^{-1}$)
(i) $[Cr(CN)_6]^{3-}$	(P) 17000
(ii) $[Cr(H_2O)_6]^{3+}$	(Q) 15000
(iii) $[Cr(en)_3]^{3+}$	(R) 12000
(iv) $[CrF_6]^{3-}$	(S) 20000

The IUPAC name for the complex \( [\text{Co}(\text{ONO})(\text{NH}_3)_5]\text{Cl}_2 \) is

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The Correct Option is B

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