The correct option(s) regarding the complex `[Co(en)(NH_(3))_(3)(H_(2)O)]_(3)+ en = H_(2)NCH_(2)CH_(2)NH_(2)` is (are)

Options

A. It has two geometrical isomers
B. It will have the geometrical if bidentate 'en ' is replaced by two cyanide ligands
C. It is paramagnetic
D. It absorbs at long wavelength as compared to `[Co(en) (NH_(3))_(4)]^(3+)`

Answer

abd

Explanation

(a) `[Co(en) (NH_(3))_(3)(H_(2)O)]^(3+)` complex is type of `[M (A A) b_(3)c]` have two G.I.

(b) If (en) is replaced by two cyanide ligand, complex will be of `[Ma_(3)b_(2)c]` and have 3 G.I.

(c ) `[Co(en)(NH_(3))_(3)(H_(2)O)]^(3+)` have `d^(6)` configuration `(t_(2g)^(6))` on central metal with SFL therefore it is diamagnetic in nature.
(d) Complex `[Co(en)(NH_(3))_(3)(H_(2)O)]^(3+)` have lesser CFSE `(Delta _(o))` value than `[Co(en)(NH_(3))_(4)]^(3+)` therefore complex `[Co(en)(NH_(3))_(3)(H_(2)O)]^(+)` absorb longer wavelength for d-d transition