COMEDK2023ChemistryCoordination Compounds
Ti ²⁺ is purple while Ti ⁴⁺ is colourless because
Options
- ATi ²⁺ has 3 d^2 configuration
- BTi ⁴⁺ has 3 d^2 configuration
- CTi ²⁺ is very small cation when compared to Ti ²⁺ and hence, doesn't absorb any radiation
- DThere is no crystal field effect in Ti ⁴⁺
Correct answer
A. Ti ²⁺ has 3 d^2 configuration
Step-by-step solution
aligned Ti ²⁺ & =[ Ar ] 3 d^2 Ti ⁴⁺ & =[ Ar ] 3 d^0 aligned Ti ²⁺ has two unpaired electrons in 3 d orbital and hence d-d transition is possible due to absorption of light in visible region whereas Ti ⁴⁺ is diamagnetic hence colourless.