AQA A level Chem 3.1 Introduction to Organic Chemistry
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4 Terms
Define the term stereoisomers. (2)
(Different molecules/compounds with the) same (molecular and) structural formula (1)
Different spatial arrangement of atoms (1)
Under suitable conditions, 2-bromobutane reacts with sodium hydroxide to
produce a mixture of five products, A, B, C, D and E.
Products A, B and C are alkenes.
A is a structural isomer of B and C.
A does not exhibit stereoisomerism.
B and C are a pair of stereoisomers.
Products D and E are alcohols.
D and E are a pair of enantiomers.
Deduce the name of isomer A. Explain why A does not exhibit stereoisomerism. (2)
A = but-1-ene (1)
two groups/atoms/Hs the same on one of the C=C carbons (1)
Under suitable conditions, 2-bromobutane reacts with sodium hydroxide to
produce a mixture of five products, A, B, C, D and E.
Products A, B and C are alkenes.
A is a structural isomer of B and C.
A does not exhibit stereoisomerism.
B and C are a pair of stereoisomers.
Products D and E are alcohols.
D and E are a pair of enantiomers.
Deduce the name of isomer B and the name of isomer C. Explain the origin of the stereoisomerism in B and C. (2)
Z-but-2-ene AND E-but-2-ene (1)
lack of/restricted/no (free) rotation around C=C/double bond (1)
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