Friday labs
Relative Rates of
Bromination
|
Arene |
Time elapsed for color change at 35 °C. |
Time elapsed for color change at 0 °C (Only 2 Arenes were not clearly distinguished at 35 °C) |
|
Phenol |
Immediate change in color |
|
|
Anisole |
1 minute |
|
|
4-Bromophenol |
2 – 2.5 minutes |
|
|
Acetanilide |
Slow change in color 3 – 4
minutes |
4 – 5 minutes for color to
change |
|
Diphenyl Ether |
After about 10 minutes no
change in color observed |
Monitored for 15 minutes
and color did not change |
Nitration of
Bromobenzene
Melting Point: 120-123 °C
Wt of Product obtained: 0.441g
Saturday Morning Labs
Relative Rates of Bromination
|
Substrate (1) |
Approx. time of rxn @ 0˚ C |
Approx. time of rxn @ 35˚ C |
|
Phenol |
35 sec |
1 sec |
|
Anisole |
135 sec |
3 sec |
|
Diphenyl ether |
NR |
> 5 min |
|
Acetanilide |
75 sec |
20 sec |
|
4-bromophenol |
45 sec |
5 sec |
Nitration of
Bromobenzene
Melting Point: 124-126 °C
Wt of Product obtained: 0.351g
Saturday Afternoon Labs
Relative Rates of Bromination
|
Substrate (1) |
Approx. time of rxn @ 0˚ C |
Approx. time of rxn @ 35˚ C |
|
Phenol |
na |
5 sec |
|
Anisole |
na |
9 sec |
|
Diphenyl ether |
NR |
> 5 min |
|
Acetanilide |
2 min 11 sec |
85 sec |
|
4-bromophenol |
na |
15 sec |
Nitration of
Bromobenzene
Melting Point: 125-128 °C
Wt of Product obtained: 0.235g