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A Level Chemistry OCR A > Module 6 - Definitions > Flashcards

Module 6 - Definitions Flashcards

1
Q

What is an arene?

A

Aromatic compounds containing a benzene ring as part of their structure.

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2
Q

What is the molecular formula of benzene?

A

C6H6

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3
Q

What causes the central ring inside of benzene?

A

The outer electron from the p-orbital of each carbon atom is delocalised into the centre, this overlap of electrons results in the formation of pi-bond.

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4
Q

What is the mechanism and reagents for the nitration of benzene?

A

Reagents: conc nitric acid in the presence of concentrated sulphuric acid.
Mechanism: Electrophilic substitution

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5
Q

What is the mechanism and conditions for the halogenation of benzene?

A

Mechanism: Electrophilic substitution
Conditions: iron bromide catalyst (FeBr3) or aluminium chloride catalyst (AlCl3)

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6
Q

What is the equation for the formation of the electrophile for the nitration of benzene?

A

HNO3 + 2H2SO4 = NO2+ + 2HSO4- + H3O+

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A Level Chemistry OCR A (5 decks)

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