The magnetic property, dipole moment, plane of symmetry, colour and absorption band can be helpful in structure elucidation of complex compounds.
Which of the following complex ion is expected to absorb light in 4000 Å to 7800 Å region ?
a. [Ti(en)3]4+
b. [Cr(H2O)6]3+
c. [Sc(NH3)4(H2O)2]3+
d. [Zn(en)2(NH3)2]2+