BENZENE

Question 1

Benzene

Answer 1

benzene is a cyclic planar molecule with a formula of c6h6

Question 2

delocalised electrons in benzene

Answer 2

due to the delocalised electrons, all the C-C bond in the molecule are the same, having the same bond length.

Question 3

delocalised ring of electrons

Answer 3

the lone electrons in the p orbital combines to form a delocalised ring of electrons.

Question 4

stability of benzene

Answer 4

• benzene is more stable than theoretical theoretical alternative cyclo hexa - 1,3,5 triene.
• stability of benzene is measured by comparing enthaloy change of hydrogenation in benzene and cyclo hexa - 1,3,5 triene.

Question 5

benzene stability

Answer 5

• more energy required to break bonds in benzene rather than breaking cyclo hexa - 1,3,5 triene
• suggests that stability is due to delocalised electron structure.

Question 6

arenes

Answer 6

aromatic compounds containing a benzene ring are called arenes.