The correct option(s) regarding the complex Coen NH33H2O3+(en = H2NCH2CH2NH2 ) is (are)

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It has two geometrical isomers

It will have three geometrical isomers if bidentate 'en' is replaced by two cyanide ligands

It is paramagnetic

It absorbs light at longer wavelength as compared to Coen NH343+

answer is A.

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Detailed Solution

A) [Co(en)(NH3)3(H2O)]+3 complex is type of [M(AA)b3c] have two Geometrical isomers.B) If (en) is replaced by two cyanide ligand, complex will be type of [Ma3b2c] and have 3 G.I.C) [Co(en)(NH3)3(H2O)]3+ have d6 configuration (t 62g) on central metal with SFL therefore it is diamagnetic in nature.D) Complex [Co(en)(NH3)3(H2O)]3+ have lesser CFSE ( O) value than [Co(en)(NH3)4]3+ therefore complex [Co(en)(NH3)3(H2O)]+ absorbs longer wavelength for d–d transition.

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