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Date	May 2017	Marks available	1	Reference code	17M.2.sl.TZ1.6
Level	SL	Paper	2	Time zone	TZ1
Command term	State	Question number	6	Adapted from	N/A

Question

Benzene is an aromatic hydrocarbon.

Discuss the physical evidence for the structure of benzene.

[2]

State the typical reactions that benzene and cyclohexene undergo with bromine.

[1]

Markscheme

Any two of:

planar «X-ray»

C to C bond lengths all equal
OR
C to C bonds intermediate in length between C–C and C=C

all C–C–C bond angles equal

Accept all C to C bonds have same bond strength/bond energy.

[2 marks]

benzene: «electrophilic» substitution/S_E
AND
cyclohexene: «electrophilic» addition/A_E

Accept correct equations.

[1 mark]

Examiners report

[N/A]

Syllabus sections

Core » Topic 10: Organic chemistry » 10.1 Fundamentals of organic chemistry

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