251203
Description
Flashcards by jasmin.sahota, updated more than 1 year ago
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Created by jasmin.sahota
over 10 years ago
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| Question | Answer |
| oxidation of primary alcohols gives | Aldehydes |
| If product | Distilled off as it forms |
| The oxidising agent is | Acidified K2CrO7 |
| Colour change | Orange to green |
| But if refluxed with | excess K2CrO7 |
| Then a | Carboxylic acid will form |
| Give equation for partial oxidation of butan-1-ol | C4H9OH + [O] --> C3H7CHO + H2O |
| And an equation to show full oxidation | C4H9OH + 2[O] --> C3H7COOH + H2O |
| During the full oxidation what are the “conditions” | Reflux with an excess of acidified Cr2O72- |
| What forms on oxidation of propan-2-ol | propanone |
| Can you oxidiose this further? | No, Ketones cannot be oxidised |
| Equation for oxidation of ethanal | CH3CHO + [O] --> CH3COOH |
| Reagent for reduction of carbonyls | NaBH4 |
| Conditions for this reaction | In aqueous or ethanolic soln and refluxed |
| What forms when carbonyls are reduced | Alcohols |
| Equation for reduction of propanone | CH3COCH3 + 2[H] --> CH3CH2OHCH3 |
| Name of Mechanism for reaction | Nucleophilic addition |
| What is the nucleophile | H- |
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