Edexcel IAL Chemistry 15.13 Acyl chloride and ester nomenclature

Split an ester at the C-O bond to name the alkyl group and carboxylate part, or work backwards from an acyl chloride or alcohol to the product structure.

Exam points

Name esters from their alcohol-derived alkyl group and carboxylate acid fragment.
Deduce alcohol or acyl chloride reactants from the ester structure or product name.
Draw ester, cyclic ester or acyl chloride structures from systematic names.

[Maximum number: 1]

This question is about carboxylic acids and their derivatives.

An organic compound E contains carbon, hydrogen and oxygen only.

The accurate relative atomic masses, $A_{r}$ , of the three elements in E are shown in the table.

Table for Question 15.17—Data from mass spectra to: i suggest possible structures of a simple organic compound given accurate relative molecular question 1 — Edexcel A-Level Chemistry A2

E contains five carbon atoms and gives a molecular ion peak at m / z=102.0678 in its mass spectrum.

Deduce the molecular formula of E.

$\mathrm{C}_{5} \mathrm{H}_{10} \mathrm{O}_{2}$

Allow symbols in any order

Ignore any working Ignore + charge

(1)

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15.17—Data from mass spectra to: i suggest possible structures of a simple organic compound given accurate relative molecular question 1