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The complex with the most intense color among following is?           
  • a)
    [FeF6]3–      
  • b)
    [MnCl4]2–  
  • c)
    [CoCl4]2–              
  • d)
    [CoF6]3–
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The complex with the most intense color among following is?a)[FeF6]3&n...
The answer is a) [FeF6]3-.

This complex has a deep purple color, which is a characteristic of high-spin octahedral iron(III) complexes. The intense color is due to the d-d transition of the iron(III) ion, which involves the promotion of an electron from the t2g to the eg orbitals.
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The complex with the most intense color among following is?a)[FeF6]3&n...
Because in option C Co is tetrahedral and tetrahedral molecules have no centre of sym so it's laporte partly allowed and spin allowed.... so it's give intense color and it's molar absorptivity in the range of 1000 while in in option b it's laporte partly allowed but spin forbidden.... in a and d both laporte forbidden so c give intense color
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The complex with the most intense color among following is?a)[FeF6]3– b)[MnCl4]2–c)[CoCl4]2–d)[CoF6]3–Correct answer is option 'C'. Can you explain this answer?
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