Question

Which of the following cannot form both high- and low-spin octahedral complexes?
Choose one answer and justify your answer:
i) Cr2+ ii) V2+ iii) Co3+ iv) Mn2+

Answer 1

Answer on Question 61688 – Chemistry - Inorganic Chemistry

All mentioned ions Cr²⁺, V²⁺, Co³⁺, Mn²⁺ have their electron configuration 3d⁴, 3d³, 3d⁶, 3d⁵ respectively.

Answer: iv) Mn²⁺ ion usually makes high-spin state octahedral complexes, where the metal has a stable, half-filled d subshell.