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प्रश्न
Compare SN1 and SN2 reaction mechanisms.
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उत्तर
| SN1 | SN2 | |
| Rate law | Unimolecular (Substrate only) | Biomolecular (substrate and nucleophile) |
| “Big Barrier” | Carbocation stability | Steric hindrance |
| Alkyl halide (electrophile) | 3° > 2° > 1° | 1° > 2° > 3° |
| Nucleophile | Weak (generally neutral) | Strong (generally bearing a negative charge) |
| Solvent | Polar protic (e.g., alcohols) | Polar aprotic (e.g., DMSO, acetone) |
| Stereo Chemistry | Mix of retention and inversion | inversion |
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संबंधित प्रश्न
Of the following compounds, which has the highest boiling point?
Match the compounds given in Column I with suitable items given in Column II.
| Column I (Compound) | Column II (Uses) |
||
| A | Iodoform | 1 | Fire extinguisher |
| B | Carbon tetra chloride | 2 | Insecticide |
| C | CFC | 3 | Antiseptic |
| D | DDT | 4 | Refrigerants |
The most easily hydrolysed molecule under SN1 condition is ______.
Which one of the following is most reactive towards nucleophilic substitution reaction?
Silver propionate when refluxed with Bromine in carbon tetrachloride gives ______.
Mention any three methods of preparation of haloalkanes from alcohols.
t – butyl chloride reacts with aqueous KOH by SN1 mechanism while n – butyl chloride reacts with SN2 mechanism.
In an experiment ethyliodide in ether is allowed to stand over magnesium pieces. Magnesium dissolves and product is formed
- Name the product and write the equation for the reaction.
- Why all the reagents used in the reaction should be dry? Explain.
- How is acetone prepared from the product obtained in the experiment.
Predict the product when Bromo ethane is treated with the following.
KNO2
The simplest alkene (A) reacts with HCl to form a compound (B). Compound (B) reacts with ammonia to form compound (C) of molecular formula C2H7N. Compound (C) undergoes carbylamine test. Identify (A),
(B) and (C).
