Preparation and Reactivity of Sn1 2-Bromobutane

The purpose of part 2 of the lab is to determine the relative reactivity of alkyl halides under SN1 conditions. Results and Discussion The Overall Reaction The Proposed Mechanism Experimental Procedure To prepare 2-bromobutane in part one of the lab, you have to set up a flask apparatus with a thermowell and a Claisen adapter. Attached to the Claisen adapter is a thermometer measuring the temperature in the flask and a vertical condenser for reflux. Add in the reactants to the flask, sulfuric acid, 2-butanol, and ammonium bromide. Heat to 95OC and then maintain temperature for 30 minutes. Then, water was added and simple distillation began. The aqueous layer of the distillate was removed leaving the product, 2-bromobutane. For part 2, two drops of each of the following were placed in 3 different test tubes: 2-bromobutane, 1-bromoutane, and 2-Bromo-2-methylpropane.
In each of the tubes, an even amount of silver nitrate is added. Observations of the reactions precipitate are recorded. The same process is done with 2-chlorobutanol, 2-iodobutane, and 2-bromobutane.

Experimental Stoichiometry Compound
Quantity
Moles
2-butanol

Molecular weight
74. 12 g
7. 4 mL (6. 0 g)
0. 081

Sulfuric acid
98. 08 g
20 mL (12M)
0. 24

Ammonium bromide
97. 94 g
8. 0 g
0. 082