Question

A compound which analyses as CrBr3.3H2O has an experimental magnetic moment of 3.87 Bohr Magnetons (B.M.). The electronic spectrum of an aqueous solution of this shows three absorption bands, the lowest energy one being at ca. 20,000 cm-1 with an extinction coefficient (max) of less than 10 L mol-1 cm-1 . Account for these observations and draw a structure of the complex consistent with these data.

Answer 1