The tetrahedral complex [CoCl4]^2- is high spin and has three unpaired electrons. Taking mu=sqrtn(n+2) BM, calculate its spin-only magnetic moment in BM, to two decimal places.

JEE Main levelNumerical answerDifficulty 2 of 3df139

The tetrahedral complex $[CoCl X_{4}] X^{2 -}$ is high spin and has three unpaired electrons. Taking $μ = n (n + 2)$ BM, calculate its spin-only magnetic moment in BM, to two decimal places.

Numerical answer type, answer in BM, tolerance 0.01.

Co is +2 (

3 d^{7}

). In a tetrahedral high-spin arrangement

e^{4} t_{2}^{3}

there are

n = 3

unpaired electrons.

μ = 3 \times 5 = 15 = 3.87 BM