The $\mathrm{Cl}-\mathrm{Co}-\mathrm{Cl}$ bond angle values in a fac$[\mathrm{Co}(\mathrm{NH}_{3})_{3} \mathrm{Cl}_{3}]$ complex is/are:

(A) $90^{\circ}$ & $180^{\circ}$

(D) $90^{\circ}$ & $120^{\circ}$

JEE Main · 2023 · 30 Jan 2023 · Shift 2 · Coordination Compounds

The

Cl - Co - Cl

bond angle values in a fac

[Co (NH_{3})_{3} Cl_{3}]

complex is/are:

(A) $9 0^{\circ}$ & $18 0^{\circ}$
(B) $9 0^{\circ}$ ✓ Correct
(C) $18 0^{\circ}$
(D) $9 0^{\circ}$ & $12 0^{\circ}$

Answer: (B)

Solution

In the facial isomer the three chloride ligands all lie on one triangular face of the octahedron, so each chloride is cis to the other two. Any two cis positions of an octahedron subtend an angle of

9 0^{\circ}

at the metal, and no chloride lies directly opposite another. Every

Cl - Co - Cl

angle in the complex is therefore

9 0^{\circ}

JEE Main · 2023 · 30 Jan 2023 · Shift 2 · Single correct option

Practise more: all JEE Main PYQs on Coordination Compounds →

More JEE Main questions on Coordination Compounds

Given below are two statements:

Statement I: Among $[Cu (NH_{3})_{4}]^{2 +}$ , $[Ni (en)_{3}]^{2 +}$ , $[Ni (NH_{3})_{6}]^{2 +}$ and $[Mn (H_{2} O)_{6}]^{2 +}$ , …
JEE Main 2026View solution →
Consider the transition metal ions $Mn^{3 +}, Cr^{3 +}, Fe^{3 +}$ and $Co^{3 +}$ and all form low spin octahedral complexes. The correct decreasing order of unpaired electrons in their respective d-orbitals of the complexes is
JEE Main 2026View solution →
A first row transition metla (M) does not liberate $H_{2}$ gas from dilute HCl .1 mol of aqueous solution of $MSO_{4}$ is treated with excess of aqueous KCN and then $H_{2} S (g)$ is passed through the solution. The amount of MS …
JEE Main 2026View solution →
Given below are two statements:

Statement I: Crystal Field Stabilization Energy (CFSE) of $[Cr (H_{2} O)_{6}]^{2 +}$ is greater than that of $[Mn (H_{2} O)_{6}]^{2 +}$ .

Statement II: Pot …
JEE Main 2026View solution →
Identify the metal ions among $Co^{2 +}$ , $Ni^{2 +}$ , $Fe^{2 +}$ , $V^{3 +}$ and $Ti^{2 +}$ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the high spin octahedral complexes formed by thos …
JEE Main 2026View solution →
$[Ni (PPh_{3})_{2} Cl_{2}]$ is a paramagnetic complex. Identify the INCORRECT statements about this complex.
A. The complex exhibits geometrical isomerism.
B. The complex is white in colour.
C. The calculated spin-only magnetic moment of the complex is 2. …
JEE Main 2026View solution →