Which of the following order of CFSE is incorrect?

Options

A. `[Co(en)_(3)]^(3+) gt [Co(NH_(3))_(6)]^(3+) gt [Co(H_(2)O)_(6)]^(3+)`
B. `[PtCl_(4)]^(2-) gt [PdCl_(4)]^(2-) gt [NiCl_(4)]^(2-)`
C. `[Ni(DMG)_(2)] lt Ni(en)_(2)]^(2+)`
D. `[Co(o x)_(3)]^(3-) lt [Co(en)_(3)]^(3+)`

Answer

B

Explanation

`[Ni(DMG)_(2)] lt [Ni(en)_(2)]^(2+)` is incorrect order of C.F.S.E. because stability of chelated complex is directly related to number of stable rings.