EXPT 9 Dehydration

As the reagents are mixed the presence of a double

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: esence of a double bond is indicated by the disappearance of the orange/red color. If no double bond is present, the reaction does not occur and the orange/red color of the bromine solution persists. This test is also used for alkynes, and the difference between an alkene and an alkyne can be determined if the test is done as a titration and the molar amount of bromine added per mole of reactant is determined. Br Br2/CH2Cl2 (Eq. 5) Br Mechanism: δ+ Br Br δ− Br Br Br Br Before beginning this experiment, the applicable sections in the Technique folder must be read and understood (distillation, drying agents, IR spectroscopy and yield calculations). Cyclohexene from Cyclohexanol Reaction: OH H+ + H2O Procedure: Mix 3.0 ml of cyclohexanol and 4.0 ml of concentrated (85%) phosphoric acid in a clean, dry 50 ml round bottom flask. Add 5 drops of concentrated sulfuric acid to the mixture. Add 1-2 boiling stones and attach the flask to a simple distillation set-up as the distilling flask. Cool the receiving 25 mL round bottom flask in a bath of ice water, immersed to the neck of the flask. Distill the contents of the flask until the temperature of the distillate reaches 85oC, or until the temperature of the distillate drops. Allow the apparatus to cool to room te...
View Full Document

This note was uploaded on 12/15/2012 for the course CHE 301 taught by Professor Lucy during the Spring '12 term at VCU.

Ask a homework question - tutors are online