Which of the following statements concerning the complex ion Co(en)₂Cl₂⁺ is true? (en = ethylenediamine,NH₂CH₂CH₂NH₂)? A)The complex ion contains Co(I). B)The complex ion exhibits cis and trans geometrical isomers,but no optical isomers. C)The complex ion exhibits two geometrical isomers (cis and trans)and two optical isomers. D)Since en is a strong field ligand (large $\Delta$),the complex ion is paramagnetic. E)The geometric isomers of the complex ion have identical chemical properties.

Question

Quizplus · Accepted Answer

- The presence of the ligand en suggests that the complex ion is a coordination complex of cobalt(III).
- The ligand en is a strong field ligand, thus causing a large splitting of the d-orbitals and leading to the possibility of geometric isomers. 
- The complex ion contains one bidentate ligand (en) and three unidentate ligands (Cl-, S2-, and S2O32-). Since en can be arranged in cis and trans positions relative to each other, two geometric isomers are possible (cis and trans).
- The complex ion also contains a chiral center at the cobalt atom, which could give rise to two optical isomers (R and S). 
- Therefore, the complex ion exhibits two geometrical isomers (cis and trans) and two optical isomers.

Which of the Following Statements Concerning the Complex Ion Co(en)2Cl2+ Δ\DeltaΔ

Which of the Following Statements Concerning the Complex Ion Co(en)₂Cl₂⁺ $\Delta$