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When one CO group is replaced by PPh3 in [Cr(CO)6], which one of the following statements is
TRUE?
- a)The Cr-C bond length increases and CO bond length decreases
- b)The Cr-C bond length decreases and CO bond length decreases
- c)The Cr-C bond length decreases and CO bond length increases
- d)The Cr-C bond length increases and CO bond length increases
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
When one CO group is replaced by PPh3in [Cr(CO)6], which one of the fo...
Explanation:
Replacing one CO group by PPh3 in [Cr(CO)6] results in the formation of [Cr(CO)5(PPh3)], which is a square pyramidal complex.
Effects on bond lengths:
- The Cr-C bond length decreases: The addition of PPh3 to the Cr center leads to a decrease in the Cr-C bond length. This is due to the trans influence of the PPh3 ligand, which weakens the Cr-CO bond and strengthens the Cr-C-P bond.
- The CO bond length increases: The removal of one CO ligand leads to a decrease in the electron density around the Cr center, causing the remaining CO ligands to assume a bent geometry. This results in an increase in the CO bond length.
Therefore, the correct answer is option 'C' - The Cr-C bond length decreases, and the CO bond length increases.
Summary:
- [Cr(CO)6] is octahedral and has six CO ligands.
- [Cr(CO)5(PPh3)] is square pyramidal and has five CO ligands and one PPh3 ligand.
- The addition of PPh3 to the Cr center weakens the Cr-CO bond and strengthens the Cr-C-P bond, leading to a decrease in the Cr-C bond length.
- The removal of one CO ligand leads to a decrease in the electron density around the Cr center, causing the remaining CO ligands to assume a bent geometry and an increase in the CO bond length.
Replacing one CO group by PPh3 in [Cr(CO)6] results in the formation of [Cr(CO)5(PPh3)], which is a square pyramidal complex.
Effects on bond lengths:
- The Cr-C bond length decreases: The addition of PPh3 to the Cr center leads to a decrease in the Cr-C bond length. This is due to the trans influence of the PPh3 ligand, which weakens the Cr-CO bond and strengthens the Cr-C-P bond.
- The CO bond length increases: The removal of one CO ligand leads to a decrease in the electron density around the Cr center, causing the remaining CO ligands to assume a bent geometry. This results in an increase in the CO bond length.
Therefore, the correct answer is option 'C' - The Cr-C bond length decreases, and the CO bond length increases.
Summary:
- [Cr(CO)6] is octahedral and has six CO ligands.
- [Cr(CO)5(PPh3)] is square pyramidal and has five CO ligands and one PPh3 ligand.
- The addition of PPh3 to the Cr center weakens the Cr-CO bond and strengthens the Cr-C-P bond, leading to a decrease in the Cr-C bond length.
- The removal of one CO ligand leads to a decrease in the electron density around the Cr center, causing the remaining CO ligands to assume a bent geometry and an increase in the CO bond length.
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When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer?
Question Description
When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer?.
When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer?.
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When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of When one CO group is replaced by PPh3in [Cr(CO)6], which one of the following statements isTRUE?a)TheCr-Cbond length increases and CO bond length decreasesb)TheCr-Cbond length decreases and CO bond length decreasesc)TheCr-Cbond length decreases and CO bond length increasesd)TheCr-Cbond length increases and CO bond length increasesCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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