Repeat unit construction
What Repeat unit construction means in Chemistry A-Level, as defined for OCR.
Definitions of Repeat unit construction
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain Repeat unit construction in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Locate the C=C double bond and open it so each of those two carbons forms a single bond to the next repeat unit, with the two-carbon backbone section enclosed in brackets.
Draw the monomers, remove the eliminated groups, and join the ends, so the repeat unit contains two new linkages and lacks the atoms of the expelled molecule.
Topics that use Repeat unit construction
- Alkenes (OCR A-Level)
- Polyesters and polyamides (OCR A-Level)
Related terms
- Addition polymerisation
- Acid hydrolysis of esters
- Addition polymerisation of alkenes
- Addition reactions forming other organic chemicals
- Amide group formation
- Amide linkage
- Atomic number and first point of difference
- Base hydrolysis of esters
Using Repeat unit construction in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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