For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements:
(I) Both the complexes can be high spin.
(II) Ni(II) complex can very rarely be of low spin.
(III) With stron

Question

For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements:
(I) Both the complexes can be high spin.
(II) Ni(II) complex can very rarely be of low spin.
(III) With strong field ligands, Mn(II) complexes can be low spin.
(IV) Aqueous solution of Mn(II) ions is yellow in color.
The correct statements are:

Canvas Classes · Accepted Answer

Strategy:
 Validate the characteristics of general  and  complexes.

Step 1: Evaluate (I)
"Both the complexes can be high spin."
Octahedral  () forms high-spin complexes with weak field ligands like  or . Tetrahedral  () is effectively always high spin since  is always small. So, True.

Step 2: Evaluate (II)
"Ni(II) complex can very rarely be of low spin."
This refers to the tetrahedral  specified in the prompt. Tetrahedral complexes have a small splitting energy (), which is almost always small

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