Topic: Crystal field theory, colour and magnetic properties· Coordination Compounds
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co^3+ is :
1. \([Co(H_2O)_6]^{3+}, [Co(en)_3]^{3+}, [Co(NH_3)_6]^{3+}\)
2. \([Co(H_2O)_6]^{3+}, [Co(NH_3)_6]^{3+}, [Co(en)_3]^{3+}\)
3. \([Co(NH_3)_6]^{3+}, [Co(en)_3]^{3+}, [Co(H_2O)_6]^{3+}\)
4. \([Co(en)_3]^{3+}, [Co(NH_3)_6]^{3+}, [Co(H_2O)_6]^{3+}\)