for a suzuki reaction The purification procedure says:“Add water dropwise. Durin
ID: 564202 • Letter: F
Question
for a suzuki reaction
The purification procedure says:“Add water dropwise. During this addition, some material will precipitate. Shake the tube after each addition of water to see if the solid will dissolve. Add water until a very small amount of crystals remains after shaking. After crystallization has begun, cool the mixture to 0°C.” Propose an explanation for why adding water to the test tube causes crystals to form. Make sure your explanation addresses the intermolecular interactions that are taking place, and both solvents that are present in the mixture.
Explanation / Answer
Here we consider acetone,
Acetone or CH3 -CO-CH3 is a polar molecule like water. The C=O group present in acetone make its polar. Oxygen is highly electronegative compared to Carbon. So oxygen will get a partial negative charge and partial positive charge to Carbon. If a substance dissolves in acetone means it is a polar molecule, because only polar substances will dissolve in polar solvents.
If your compound formed as a precipitate or settled, it implies that it is non-polar. Most time water is considered as universal solvent. But most time organic compound dissolve in hydrocarbon solvents like hexane, Chloroform or CCl4.
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