In: Chemistry
Bromination of Alkenes
mass of trans-stilbene = 0.30g
products are meso-1,2-dibromo-1,2-diphenylethane and with mp of 238 deg C and 110 deg C
Molecular weight = 340.058 g/mole
mass of trans-cinnamic acid = 0.45g
Products are erythro-2,3-dibromo-3-phenylpropanoic acid, mp: 203 deg C and threo-2,3-dibromo-3-phenylpropanoic acid, mp:94 deg C
Molecular weight = 307.969 g/mole
10% Br2/CH2Cl2 = 2.0mL for both reactions
3.5 mL methylene chloride for both
1).
Mass of trans-stilbene |
g |
|
Mass of trans-stilbene Product |
g |
|
Theoretical Yield of trans-stilbene Product |
g |
|
Percent Yield of trans-stilbene Product |
% |
|
Melting Point of trans-stilbene Product |
°C |
|
Identity of trans-stilbene Product(s) |
||
Mechanism for Bromination of trans-stilbene |
2). Structure of trans-stilbene product(s):
3).
Mass of trans-cinnamic acid |
g |
|
Mass of trans- cinnamic acid Product |
g |
|
Theoretical Yield of trans- cinnamic acid Product |
g |
|
Percent Yield of trans- cinnamic acid Product |
% |
|
Melting Point of trans- cinnamic acid Product |
°C |
|
Identity of trans- cinnamic acid Product(s) |
||
Mechanism for Bromination of trans- cinnamic acid |
4). Structure of trans-cinnamic acid product(s):