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Ni^(+2) ion forms a searlet red ppt with...

`Ni^(+2)` ion forms a searlet red ppt with DMG. It is a …………. Memberd ring.

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The correct Answer is:
5
`HO-N=overset(CH_(3))overset(|)C-overset(CH_(3))overset(|)C=N-OH`
Dimethyl glyoxime (DMG)
The .N. atoms donate a lone pair each to the metal atom and thus two 5-membered rings are formed through chelation in `[Ni(dmg)_(2)]` complex.
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