Coordination compound
Magnetic movement
$$ \mu = \sqrt{n(n + 2)}BM $$
Stability constant for reaction
$$ \text{for reaction : M + 4L} \rightleftharpoons ML_{\,4}$$
$$ \text {overall stability constant of complex }: $$
$$ (ML_{\,4}) is \beta_{\,4} $$
$$ = \frac{[ML_{\,4}]}{[M][L]^{4}} $$