Chemistry - Coordination Chemistry Question with Solution | TestHub
When an electron from a lower energy d orbital is excited to a higher energy d orbital, the energy of excitation corresponds to the frequency of light absorbed. This frequency generally lies in the visible region.
The color observed corresponds to the complementary color of the light absorbed.
Consider an aqueous solution of the complex of a 3d-series metal ion: ²⁻, ²⁺, and ²⁺ are have different colour ; one of them is red other are yellow and blue.
In case of :
Options:(select one or more)
Answer:
Solution:
For :
Mn²⁺ = 3d⁵.
NH₃ is not strong enough to pair all 3d electrons of Mn²⁺, so it forms a high-spin complex Therefore, (A)
Electronic configuration:
The two orbitals are and (axial-direction orbitals), each containing one unpaired electron. (B)
High-spin octahedral Mn²⁺ uses **sp³d² (outer orbital)** hybridization, not d²sp³. (C)
and are not the pair of d-orbitals used for inner-orbital octahedral hybridization. (D)
Final Answer: A, B.