Compounds A and B are isomers with formula C3H7X, where X is a halogen - HSC - SSCE Chemistry - Question 38 - 2024 - Paper 1
Question 38
Compounds A and B are isomers with formula C3H7X, where X is a halogen. The mass spectrum for compound A is shown.
Compounds A and B undergo substitution reactions ... show full transcript
Worked Solution & Example Answer:Compounds A and B are isomers with formula C3H7X, where X is a halogen - HSC - SSCE Chemistry - Question 38 - 2024 - Paper 1
Step 1
Draw the structure of compound A
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Answer
Compound A is identified as 1-bromopropane with the structure:
Br
|
H3C-CH2-CH2
The mass spectrum indicates a peak at m/z 122, which corresponds to the presence of bromine.
Step 2
Draw the structure of compound B
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Answer
Compound B is 2-bromopropane, represented as:
Br
|
H3C-CH-CH3
This compound is isomeric with compound A and also follows the chemical characteristics needed.
Step 3
Draw the structure of compound E
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Answer
Compound E is an ester formed from the reaction of 3-methylbutanoic acid and propan-1-ol. Its structure is:
O
||
H3C-CH2-C-O-CH2-CH3
The NMR spectrum data supports this; for example, the doublet and triplet indicate adjacent protons interacting with different environments.
