Explain the role of CH3CO2Na n the preparation of Fe(C5H7O2)3)3
CH3CO2Na, also known as sodium acetate, is commonly used as a reagent in organic chemistry. In the preparation of Fe(C5H7O2)3)3, sodium acetate plays a crucial role as a source of acetate ions (C2H3O2^-).
Here is a step-by-step breakdown of the role of CH3CO2Na in the preparation of Fe(C5H7O2)3)3:
Step 1: Dissolving FeCl3
Sodium acetate is initially dissolved in water. This process leads to the dissociation of sodium acetate into sodium ions (Na+) and acetate ions (C2H3O2^-). The dissociation is represented by the equation:
CH3CO2Na (s) → Na+ (aq) + C2H3O2^- (aq)
Step 2: Precipitation reaction
In a separate flask, iron(III) chloride (FeCl3) is dissolved in water, resulting in the dissociation of Fe3+ ions (from FeCl3) and Cl^- ions. The dissociation is represented by the equation:
FeCl3 (s) → Fe3+ (aq) + 3Cl^- (aq)
Step 3: Formation of Fe(C5H7O2)3)3
The solutions from steps 1 and 2 are mixed together. The acetate ions (C2H3O2^-) from sodium acetate react with the Fe3+ ions to form the complex compound Fe(C5H7O2)3)3.
The reaction between the acetate ions (C2H3O2^-) and Fe3+ ions is as follows:
C2H3O2^- (aq) + Fe3+ (aq) → Fe(C2H3O2)3 (s)
This complex compound can be represented as Fe(C5H7O2)3)3 for simplicity, where C5H7O2 represents the acetate ligand.
Step 4: Precipitation of Fe(C5H7O2)3)3
The complex Fe(C5H7O2)3)3 formed in step 3 is a solid precipitate. It can be separated from the solution by filtration or any suitable method.
In summary, the role of CH3CO2Na in the preparation of Fe(C5H7O2)3)3 is to provide acetate ions (C2H3O2^-), which then react with Fe3+ ions to form the desired iron(III) acetate complex compound.
CH3CO2Na, also known as sodium acetate, plays a critical role in the preparation of Fe(C5H7O2)3)3, which is a complex of iron with the ligand acetylacetonate (C5H7O2-). Let's break down the process step by step:
1. Formation of Sodium Acetate (CH3CO2Na):
- Sodium acetate can be prepared by neutralizing acetic acid (CH3COOH) with sodium hydroxide (NaOH) or sodium bicarbonate (NaHCO3).
2. Preparation of Acetylacetonate (C5H7O2-):
- Acetylacetonate, abbreviated as acac-, can be synthesized by condensing acetylacetone (C5H8O2) with sodium ethoxide (C2H5ONa) or sodium methoxide (CH3ONa).
3. Formation of Fe(C5H7O2)3)3:
- To prepare Fe(C5H7O2)3)3, the acetylacetonate ligand (C5H7O2-) and iron(III) chloride (FeCl3) are combined in a reaction medium.
4. Role of Sodium Acetate in the Preparation:
- Sodium acetate is typically added to the reaction mixture as a source of acetate ions (CH3CO2-).
- Acetate ions act as a base and promote the deprotonation of acetylacetonate ligand (C5H7O2-) to form acac-.
- This deprotonation reaction is essential for the ligand to effectively coordinate with iron(III) ions and form the desired Fe(C5H7O2)3)3 complex.
In summary, CH3CO2Na (sodium acetate) is crucial in the preparation of Fe(C5H7O2)3)3 (iron(III) acetylacetonate) as it provides the necessary acetate ions to promote the deprotonation and coordination of acetylacetonate ligands with iron(III) ions.