Draw a reaction scheme to show the expected outcome of the reaction of cis-[Co(en)2Cl2]2+ with 2,2’-bipyridine (bipy).

To draw a reaction scheme showing the expected outcome of the reaction of cis-[Co(en)₂Cl₂]²⁺ with 2,2'-bipyridine (bipy), we can follow these steps:

1. Break Down the Problem

• Identify the reactants: cis-[Co(en)₂Cl₂]²⁺ and 2,2'-bipyridine.
• Determine the nature of the ligands and the coordination changes that will occur upon the reaction.
• Analyze the geometry and the resulting complex formation.

2. Relevant Concepts

• Understand the coordination chemistry of cobalt(III), specifically with ethylenediamine (en) and bipyridine (bipy).
• The product is likely to be a cobalt complex with bipy replacing chloride ligands.

3. Analysis and Detail

• The starting complex, cis-[Co(en)₂Cl₂]²⁺, has two ethylenediamine molecules and two chloride ions coordinated to the cobalt center.
• When 2,2'-bipyridine is introduced, it can coordinate to the cobalt ion, leading to the substitution of chloride ions.

The reaction scheme can be represented as follows:

$\text{cis-[Co(en)}_2\text{Cl}_2]^{2+} + 2 \text{bipy} \rightarrow \text{[Co(en}_2\text{bipy}_2]^{3+} + 2 \text{Cl}^-$

4. Verify and Summarize

In the products, the cobalt complex contains two ethylenediamine and two bipyridine ligands, while the chloride ions are released into the solution.

Final Answer

The expected reaction outcome is represented by the formation of the complex [Co(en)₂(bipy)₂]³⁺ with the release of 2 chloride ions:

$\text{cis-[Co(en)}_2\text{Cl}_2]^{2+} + 2 \text{bipy} \rightarrow \text{[Co(en}_2\text{bipy}_2]^{3+} + 2 \text{Cl}^-$