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5. Co-ordination chemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
Indicate the complex/complex ion which did not show any geometrical isomerism :
  • A
    $\left[\mathrm{CoCl}_{2}(\mathrm{en})_{2}\right]$
  • ✓
    $\left[\mathrm{Co}(\mathrm{CN})_{5}(\mathrm{NC})\right]^{3-}$
  • C
    $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{NO}_{2}\right)_{3}\right]$
  • D
    $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}$
✓

Answer

Correct option: B.
$\left[\mathrm{Co}(\mathrm{CN})_{5}(\mathrm{NC})\right]^{3-}$
b
(1) $\left[\mathrm{CoCl}_{2}(\mathrm{en})_{2}\right]$ show Cis-trans isomerism

(2) $\left[\mathrm{Co}(\mathrm{CN})_{5}(\mathrm{NC})\right]^{-3}$ can't Show $G.I.$

(3) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{NO}_{2}\right)_{3}\right]$

Show fac $\&$ mer isomerism

(4) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{\oplus}$ show cis $\&$ trans isomerism

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