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Which of the following has longest C−O bond length? (Free C−O bond length in CO is 1.128Å.)
- a)[Fe(CO)4]2−
- b)[Mn(CO)6]+
- c)Ni(CO)4
- d)[Co(CO)4]−
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
Which of the following has longest C−O bond length? (Free C−O bond le...
Explanation:
Free C−O bond length:
- Free C−O bond length in CO is 1.128Å.
Comparison of C−O bond lengths:
- The C−O bond length in metal carbonyl complexes is influenced by the nature of the metal center and its oxidation state.
- The longer the C−O bond length, the weaker the metal-carbonyl interaction.
Analysis of options:
a) [Fe(CO)4]2−
- Iron has a relatively low charge and a large atomic size, leading to longer C−O bond lengths.
- Therefore, [Fe(CO)4]2− is expected to have longer C−O bond lengths compared to other options.
b) [Mn(CO)6]+
- Manganese has a higher charge and smaller atomic size compared to iron, resulting in shorter C−O bond lengths.
c) Ni(CO)4
- Nickel has a higher charge and smaller atomic size compared to iron, resulting in shorter C−O bond lengths.
d) [Co(CO)4]−
- Cobalt has a smaller atomic size compared to iron, and the negative charge indicates a stronger metal-carbonyl interaction, leading to shorter C−O bond lengths.
Conclusion:
- Among the given options, [Fe(CO)4]2− is expected to have the longest C−O bond lengths due to the combination of lower charge and larger atomic size of iron.
Free C−O bond length:
- Free C−O bond length in CO is 1.128Å.
Comparison of C−O bond lengths:
- The C−O bond length in metal carbonyl complexes is influenced by the nature of the metal center and its oxidation state.
- The longer the C−O bond length, the weaker the metal-carbonyl interaction.
Analysis of options:
a) [Fe(CO)4]2−
- Iron has a relatively low charge and a large atomic size, leading to longer C−O bond lengths.
- Therefore, [Fe(CO)4]2− is expected to have longer C−O bond lengths compared to other options.
b) [Mn(CO)6]+
- Manganese has a higher charge and smaller atomic size compared to iron, resulting in shorter C−O bond lengths.
c) Ni(CO)4
- Nickel has a higher charge and smaller atomic size compared to iron, resulting in shorter C−O bond lengths.
d) [Co(CO)4]−
- Cobalt has a smaller atomic size compared to iron, and the negative charge indicates a stronger metal-carbonyl interaction, leading to shorter C−O bond lengths.
Conclusion:
- Among the given options, [Fe(CO)4]2− is expected to have the longest C−O bond lengths due to the combination of lower charge and larger atomic size of iron.
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Community Answer
Which of the following has longest C−O bond length? (Free C−O bond le...
The greater the negative charge on the carbonyl complex, the more easy it would be for the metal to permit its electrons to participate in the back bonding, the higher would be the M−C bond order and simultaneously there would be larger reduction in the C−O bond order. Thus, [Fe(CO)4]2− has the lowest C−O bond order means the longest bond length.
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Which of the following has longest C−O bond length? (Free C−O bond length in CO is 1.128Å.)a)[Fe(CO)4]2−b)[Mn(CO)6]+c)Ni(CO)4d)[Co(CO)4]−Correct answer is option 'A'. Can you explain this answer?
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Which of the following has longest C−O bond length? (Free C−O bond length in CO is 1.128Å.)a)[Fe(CO)4]2−b)[Mn(CO)6]+c)Ni(CO)4d)[Co(CO)4]−Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following has longest C−O bond length? (Free C−O bond length in CO is 1.128Å.)a)[Fe(CO)4]2−b)[Mn(CO)6]+c)Ni(CO)4d)[Co(CO)4]−Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following has longest C−O bond length? (Free C−O bond length in CO is 1.128Å.)a)[Fe(CO)4]2−b)[Mn(CO)6]+c)Ni(CO)4d)[Co(CO)4]−Correct answer is option 'A'. Can you explain this answer?.
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