The species that can have a trans-isomer is :
(en = ehane-1, 2-diamine, ox = oxalate)
(en = ehane-1, 2-diamine, ox = oxalate)
Show Hint
- \([\mathrm{Cr(en)_2(ox)}]^{+}\)
- \([\mathrm{Pt(en)Cl_2}]\)
- \([\mathrm{Pt(en)_2Cl_2}]^{2+}\)
- \([\mathrm{Zn(en)Cl_2}]\)
The Correct Option is C
Solution and Explanation
(2) \([\mathrm{Pt(en)Cl_2}]\): Pt(II) square planar with one bidentate en, so the two Cl are forced cis; no trans.
(3) \([\mathrm{Pt(en)_2Cl_2}]^{2+}\): octahedral type \(\mathrm{M(AA)_2X_2}\): the two Cl can be cis or trans. It has a trans isomer.
(4) \([\mathrm{Zn(en)Cl_2}]\): tetrahedral, no cis-trans isomerism.
Answer: (3) [Pt(en)2Cl2]2+
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