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QLDChemistryQuick questions
Unit 4: Structure, synthesis and design
Quick questions on Reaction pathways and organic synthesis (QCE Chemistry Unit 4)
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the Unit 4 reaction toolkit?Show answer
The following ten transformations are the building blocks for every Unit 4 pathway. Memorise them as both forward and reverse where possible.
What is markovnikov in the wrong direction?Show answer
"Add HBr to propene" gives 2-bromopropane (major), not 1-bromopropane. If you want 1-bromopropane, you need a different route (radical addition with peroxides, outside syllabus, so use a haloalkane substitution from a primary alcohol).
What is q1?Show answer
Write a two-step pathway to convert ethanol to ethanoic acid. State the reagents and conditions. [3 marks]
What is q2?Show answer
Propose a synthesis of ethyl ethanoate from ethene in three steps. [4 marks]
What is q3?Show answer
Devise a route to 1,2-dibromoethane starting from ethane. (a) Outline steps. (b) State conditions.
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