For the following complexes, the increasing order of magnetic moment (spin only value) isA. $\left[\mathrm{TiF}_{6}\right]^{3-}$B. $\left[\mathrm{CrF}_{6}\right]^{3-}$C. $\left[\mathrm{MnF}_{6}\right]^{3-}$D. $\left[\mathrm{CoF}_{6}\right]^{3-}$
(a)D $<$ A $<$ B $<$ C
(b)C $<$ A $<$ D $<$ B
(c)B $\approx$ A $<$ D $<$ C
(d)A $<$ B $<$ C $\approx$ D
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Fluoride is weak-field: Ti³⁺ d¹ (1 unpaired), Cr³⁺ d³ (3), Mn³⁺ d⁴ high spin (4), Co³⁺ d⁶ high spin (4): A < B < C ≈ D (d).