Trans-complex is symmetric, so it has low solubility in water.
and Cl- are located at the two dz^2 of complex which has higher energy level
so it enhance d-d splitting, thereby absorbing higher frequency of light
But cis-complex is asymetric, so it has high solubility in water
and Cl- are located at dx^2-y^2 and dz^2 of complex respectively which hs lower energy level
thereby it absorbs low frequency of light.
Are these correct?