A reaction of cobalt (III) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A (violet coloured) and B (green coloured). A can show optical activity, but, B is optically inactive. What type of isomers does A and B represent?
Select the correct option:
A
Ionisation isomers
B
Coordination isomers
C
Geometrical isomers
D
Linkage isomers
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Solution
$\left[\mathrm{CoCl}_6\right]^{3-}+2(\mathrm{en}) \longrightarrow\left[\mathrm{CoCl} 2(\mathrm{en})_2\right]^{+}$
(1 : 2 mole ratio) (cis-trans isomer)
A - optically active (cis-isomer)
B - optically inactive (trans isomer)
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