BITSAT2013ChemistryCoordination CompoundsActual
The pair in which both species have same magnetic moment (spin onlyvalue) is:
Options
- A[ Cr ( H ₂ O )₆ ]²⁺, [ CoCI ₄ ]²⁻
- B[ Cr ( H ₂ O ₆ )²⁺, [ Fe ( H ₂ O )₆ ]³⁺ .
- C[ Mn ( H ₂ O )₆ )²⁺, [ Cr ( H ₂ O )₆ ]²⁺
- D[ CoCl ₄ )²⁻, [ Fe ( H ₂ O )₆ ]²⁺
Correct answer
B. [ Cr ( H ₂ O ₆ )²⁺, [ Fe ( H ₂ O )₆ ]³⁺ .
Step-by-step solution
[ Cr ( H ₂ O )₆ ]²⁺ Cr is in Cr ²⁺ form In [ Fe ( H ₂ O ) ]²⁺ Fe ²⁺ form. Both will have 4 unpaired electrons.