Chemistry · D and f Block Elements

Option B is correct since Oxalate is a bidentate ligand, and it shapes a chelate. This may be coordinated with all the O atoms. A chelate is a compound containing a ligand (typically organic) bonded to a central metal atom at two or more points.

Option A is incorrect since ammine does not form a chelate.

Option C is incorrect since carbonyl does not form a chelate.

Option D is incorrect since cyano does not form a chelate as it is a monodentate ligand.

A Is incorrect because Amine does not form chelate.

In addition, the bond with metal involves a structured donation of one or more electron pairs of the ligand. The characteristics of the metal binding differ from ionic to covalent. The bond order for metal ligands will range between 1 and 3. Ligands are classified as Lewis bases, while Lewis acidic "ligands" are uncommon cases known to occur. In chelation, the ring forming is induced by the interaction of two atoms with the metal atom from the same ligand. This is unlikely if the ligand is monodentate. The more stable are Chelates than unchelated compounds with a similar structure, and the greater the number of ring openings in the metal molecule, the more stable the compound. The most stable is Chelates. This mechanism is called the chelate effect; the thermodynamic quantity called entropy, correlated with chelation, normally decreases. Chelate durability is often correlated with the number of chelate atoms. Chelates with five or six circles are typically more secure than those with four, seven, or eight circles. Oxalate is a bidentate ligand, and it shapes a chelate. This may be coordinated with all the O atoms.

Carbonyl does not form a chelate.

Cyano does not form a chelate as it is monodentate ligand.