JEE Main · 2021 · 31 Aug 2021 · Shift 1 · Coordination Compounds

The denticity of an organic ligand, biuret is :

(A)6
(B)4
(C)2✓ Correct
(D)3

Answer: (C)

Solution

Biuret,

H_{2} N - CO - NH - CO - N H_{2}

, binds a metal ion by chelating through two of its donor atoms, one from each end, forming a stable ring, while the central nitrogen is tied up in conjugation with the carbonyl groups. Biuret therefore acts as a bidentate ligand, so its denticity is 2.

JEE Main · 2021 · 31 Aug 2021 · Shift 1 · Single correct option

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