Question

explain colour properties of coordination compound.​

Answer 1

Transition metal atoms (or) ions with one (or) more unpaired electrons and their complexes exhibit colour both in their solid and in solution states. ... The colour of coordination compounds arises from the electron transition between the split d- orbital energy levels.

Answer 2

The energy difference, Δo, determines the color of the coordination complex. According to the spectrochemical series, the high spin ligands are considered "weak field," and absorb longer wavelengths of light (weak Δo), while complexes with low spin ligands absorb light of greater frequency (high Δo).