Which one of the following will not show geometrical isomerism ? (a) [Cr(NH3)4Cl2]Cl (b) [Co(en)2Cl2]Cl

Question

Which one of the following will not show geometrical isomerism ?

(a) \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Cl}\)

(b) \(\left[\mathrm{Co}(e n)_{2} \mathrm{Cl}_{2}\right] \mathrm{Cl}\)

(c) \(\left.\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{2}\right] \mathrm{Cl}_{2}\)

(d) \(\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]\)

Answer 1

Correct option is (c) \(\left.\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{2}\right] \mathrm{Cl}_{2}\)

\(\left.\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{NO}_{2}\right] \mathrm{Cl}_{2}\) will not show geometrical isomerism because this complex showed 4 and 6 co-ordination number.