Which of the following statements is true for the complex [Fe(CN)6]3-? (2023)

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Question: Which of the following statements is true for the complex [Fe(CN)6]3-? (2023)

Options:

Correct Answer: It is a low-spin complex

Solution:

The complex [Fe(CN)6]3- is a low-spin complex due to the strong field nature of CN- ligands, resulting in paired electrons.

Which of the following statements is true for the complex [Fe(CN)6]3-? (2023)

Which of the following statements is true for the complex [Fe(CN)6]3-? (2023)

Step 1: Identify the complex in question, which is [Fe(CN)6]3-.
Step 2: Recognize that Fe (iron) in this complex has an oxidation state of +3.
Step 3: Determine the electron configuration of Fe in the +3 state, which is [Ar] 3d5.
Step 4: Understand that CN- (cyanide) is a strong field ligand.
Step 5: Know that strong field ligands cause electrons to pair up in the lower energy d-orbitals.
Step 6: Conclude that in [Fe(CN)6]3-, the electrons will be paired, leading to a low-spin configuration.

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