NEETChemistryCoordination Compounds
Given below are two statements: one is labelled as “Assertion A” and the other is labelled as “Reason R” Assertion A : In the complex Ni ( CO ) 4 and Fe ( CO ) 5 , the metals have zero oxidation state. Reason R : Low oxidation states are found when a complex has ligands capable of π -donor character in addition to the σ -bonding. In the light of the above statements, choose the most appropriate answer from the option
Options
- AA is correct but R is not correct
- BA is not correct but R is correct
- CBoth A and R are correct but R is NOT the correct explanation of A
- DBoth A and R are correct and R is the correct explanation of A
Correct answer
A. A is correct but R is not correct
Step-by-step solution
The ligand carbon monoxide has no charge, hence metals have zero oxidation state in both Ni ( CO ) 4 and Fe ( CO ) 5 . Low oxidation states are found when a complex has ligands capable of π -acceptor character in addition to the σ -bonding. In the complexes, Ni CO 4 & Fe CO 5 , the ligand CO is π - acceptor character in addition to the σ - bonding .