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Indicate the type of isomerism exhibited...

Indicate the type of isomerism exhibited by the following complexes and draw the structures for these isomers:
(i) `K[Cr(H_(2)O)_(2)(C_(2)O_(4))_(2)`
(ii) `[Co(en)_(3)]Cl_(3)`
(iii) `[Co(NH_(3))_(5)(NO_(2))](NO_(3))_(2)`
(iv) `[Pt(NH_(3))(H_(2)O)Cl_(2)]`

Text Solution

Verified by Experts

a) `K[Cr(H_(2)O)_(2)(C_(2)O))_(4)_(2)]` or `K[Cr(H_(2)O)_(2)(OX)_(2))`
i) exists as geometrical isomers:

ii) The cis isomer can also exist as pair of optical isomers.

b) the complex can exist as optical isomers. For structure, consult section .
c) The complex can exist as pair of ionisation isomers as well as linkage isomers.
Ionisation isomer : `[(CoNH_(3))_(5)(NO_(2))](NO_(3))_(2))` and `[Co(NH_(3))_(5)ONO](NO_(3))_(2)`
d) the complex can exist as pair of geometrical isomers.
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