Aromatic Chemistry Flashcards

1
Q

What is benzene?

A

A cyclic, planar molecule

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2
Q

What is the formula for benzene?

A

C₆H₆

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3
Q

Benzene structure [2]:

A
  • Each carbon is bonded to 2 other carbons and 1 hydrogen

- Final lone electron is in a p-orbital that sticks out below the planar ring

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4
Q

What happens to the C-C bonds due to the delocalised electrons?

A
  • Structure of c-c bonds in the molecule are the same

- They have the same bond length

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5
Q

What is the bond length of the c-c bonds in benzene?

A

139pm

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6
Q

What do the electrons in the p-orbital of benzene form?

A

A ring of delocalised electrons

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7
Q

cyclohexa-1,3,5-triene structure [2]:

A
  • Called kekule’s structure

- Has alternating double and single bonds

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8
Q

which one is more stable?
Benzene
cyclohexa-1,3,5-triene

A

benzene

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9
Q

Why is benzene more stable then cyclohexa-1,3,5-triene? [2]:

A
  • Benzene has delocalised electrons

- It is a planar aromatic molecule so its p orbitals overlap

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