Statement TypeDirection (Q. Nos. 24and 25) This section is based on St...
Statement I is true because CO is a neutral ligand, Statement II is true because
EAN of Fe
= Atomic number of Fe + Electrons gained by coordination
= 26 + 2 x 5 = 36
But Statement II is not the correct explanation. Correct explanation is that oxidation state of Fe in Fe(CO)5 is zero because CO is a neutral ligand.
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Statement TypeDirection (Q. Nos. 24and 25) This section is based on St...
Understanding the Statements
The question revolves around the oxidation state and effective atomic number (EAN) of iron (Fe) in the complex Fe(CO)5.
Statement I: Oxidation State of Fe
- In the complex Fe(CO)5, carbon monoxide (CO) is a neutral ligand.
- Since all ligands are neutral in this complex, the oxidation state of Fe is indeed zero.
Statement II: EAN of Fe
- The effective atomic number (EAN) can be calculated using the formula: EAN = Atomic number of the metal + Number of electrons donated by the ligands.
- The atomic number of Fe is 26.
- Each CO donates 2 electrons; thus, for 5 CO ligands: 5 × 2 = 10 electrons.
- Therefore, EAN = 26 (atomic number) + 10 (from 5 CO) = 36.
Conclusion of the Analysis
- Both statements are correct:
- Statement I is correct as Fe has an oxidation state of zero in Fe(CO)5.
- Statement II is also correct as the EAN of Fe in this complex is indeed 36.
Explanation of the Answer Option
- The correct answer is option 'B' because while both statements are correct, Statement II does not explain Statement I. The oxidation state being zero does not derive from the EAN being 36; they are separate facts about the iron complex.
In summary, both statements are true, but one does not serve to explain the other directly, leading to the selection of option 'B.'
Statement TypeDirection (Q. Nos. 24and 25) This section is based on St...
Oh thanks