Q. Among the following complexes, the one that can exist as facial (fac) and meridional (mer) isomers is
KVPYKVPY 2017Coordination Compounds
Solution:
Facial (fac) and meridional (mer) isomers are type of geometrical isomers which occurs in octahedral coordination entities of the type $Ma_{3} b_{3}$ The type of complexes given in the options are as follows :
Complexes
Type of complexes
$[Co(N0_{2})_{3}(NH_{3})_{3}]$
$[Ma_{3}b_{3}]$
$K_{3}[Fe(CN)_{6}]$
$[Ma_{6}]$
$[Co(H20 )2(NH3)4]C1$
$[Ma_{2}b_{4}]$
$[CoC1(NH3)5]C12$
$[Mab_{5}]$
Thus, $\left[ Co \left( NO _{2}\right)_{3}\left( NH _{3}\right)_{3}\right]$ shows $f a c$ and mer isomers.
| Complexes | Type of complexes |
|---|---|
| $[Co(N0_{2})_{3}(NH_{3})_{3}]$ | $[Ma_{3}b_{3}]$ |
| $K_{3}[Fe(CN)_{6}]$ | $[Ma_{6}]$ |
| $[Co(H20 )2(NH3)4]C1$ | $[Ma_{2}b_{4}]$ |
| $[CoC1(NH3)5]C12$ | $[Mab_{5}]$ |