Q.

The coordination environment of Ca2+ion in its complex with EDTA4-is:                    [2024]

1 Trigonal prismatic  
2 Square planar  
3 Tetrahedral  
4 Octahedral  

Ans.

(4)

EDTA4- is a hexadentate ligand.

Ethylene diamminetetraacetato (EDTA4-) (6 donor sites)

Hence, [CaEDTA]2-is octahedral in shape.