Question

The correct ascending order of ligand field strengths of the given ligands is

• A. F$^- <$ I$^- <$ CN$^- <$ H$_2$O $<$ CO
• B. I$^- <$ F$^- <$ H$_2$O $<$ CO $<$ CN$^-$
• C. I$^- <$ F$^- <$ H$_2$O $<$ CN$^- <$ CO
• D. F$^- <$ H$_2$O $<$ I$^- <$ CN$^- <$ CO
• E. F$^- <$ I$^- <$ CO $<$ H$_2$O $<$ CN$^-$

Hint:

Weak field → halides Strong field → CN$^-$, CO CO is strongest among common ligands.

Answer 1

The Correct Option is C