CD

Question 1

kekule structure

Answer 1

skeletal formula showing 3 double bonds on benzene

Question 2

problems with kekules benzene structure

Answer 2

. benzene doesn’t readily undergo electrophilic reactions (it doesn’t discolourise bromine water) but the structure assumes it does as it is unsaturated.

. x ray diffraction shows that the bond lengths are equal but the structure shows us 3 double bonds and 3 single bonds

Question 3

with benzene, instead of forming 3 double bonds what does it do?

Answer 3

the remaining electrons contribute to the delocalised rings above and below the plane of the molecule.

Question 4

bond angles in benzene

Answer 4

120 degrees

Question 5

what do azo compounds contain

Answer 5

R-N=N-R’

Question 6

what makes a more stable azo compound and why

Answer 6

when the R and R’ are arene groups instead of akyl groups. this is because there would be an extended system of delocalised electrons