Concept explainers
a)
Interpretation:
Starting from 1-pentanol how pentanal can be prepared is to be shown.
Concept introduction:
Primary alcohols are oxidized to carboxylic acids by strong oxidizing agents like CrO3 and KMnO4 etc. The oxidation can be stopped in the
To show:
How to prepare pentanal starting from 1-pentanol.
b)
Interpretation:
Starting from 1-hexene how pentanal can be prepared is to be shown.
Concept introduction:
When treated with ozone,
To show:
How to prepare pentanal starting from 1-hexene.
c)
Interpretation:
Starting from methylpentanoate how pentanal can be prepared is to be shown.
Concept introduction:
Carboxylic acid derivatives like esters can be converted into aldehydes by reduction with diisobutylaluminium hydride (DIBAH) followed by acidification. The reaction is normally carried out at -78°C in toluene solution.
To show:
How to prepare pentanal starting from methylpentanoate.
d)
Interpretation:
Starting from 1-pentene how pentanal can be prepared is to be shown.
Concept introduction:
Alkenes when subjected to hydroboration-oxidation yield primary alcohols which when oxidized with Dess-Martin periodinate in dichloromethane yield aldehydes.
To show:
How to prepare pentanal starting from 1-pentene.
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Chapter 19 Solutions
Organic Chemistry
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- öaly ilaäi Give a systemic name for each compound (b) CH3CH2-0–CH(CH3)2arrow_forward(a) Draw the structure of the hemiacetal formed from one mole of benzaldehyde and one mole of ethanol. (b) Draw the structure of the acetal formed from one mole of benzaldehyde and two moles of ethanol. (c) Draw the structure of 2-methoxy-2-butanol. What compounds could you prepare this from?arrow_forwardName the following aldehydes and ketones according to IUPAC rules: lel CH3ČCH,CH,CH,ČCH,CH3 (b) CH2CH2CHO ta) CH3CH2CCHCH3 tel Id) ÇH3 H CH3CH=CHCH2CH;CH "сно CH3arrow_forward
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- Draw structural formulas for these ketones. (a) Ethyl isopropyl ketone (b) 2-Chlorocyclohexanone (c) 2,4-Dimethyl-3-pentanone (d) Diisopropyl ketone (e) Acetone (f) 2,5-Dimethylcyclohexanonearrow_forwardWrite the products of the following reactions:(a) CH3CH2CH (H3 )COOH + NaOH- ?(b) 2,2-Dimethylpentanoic acid + KOH-?arrow_forward1. Give the IUPAC names for the following alcohols. (a) OH OH (b) ОН (c) HO CH3CHCH2CHCHCH3 CH2CH2CCH3 -CH3 CH3 CH3 CH3 (d) (e) (f) CH3 HO HO OHarrow_forward
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