Preparation of 2-Methyl-3-heptanol

Purpose To demonstrate the preparation of a secondary alcohol by the reaction of 

Review the Safety Alert for Preparation of Grignard Reagents (Sec. 19.2). 

Preparation Sign in at www.cengage.com/login to answer Pre-Lab Exercises, access videos, and read the MSDSs for the chemicals used or produced in this procedure. Review Sections 2.10, 2.11, 2.13, 2.17, 2.21, and 2.29. 

Apparatus Glass apparatus from the miniscale experimental procedure of Section 19.2, a 25-mL round-bottom flask, separatory funnel, ice-water bath, and apparatus for magnetic stirring, simple distillation, shortpath distillation, and ffame/ess heating. 

Setting Up While the reaction mixture for the preparation of 1-butylmagnesium bromide (Sec. 19.2) is cooling to room temperature, dissolve 1.8 mL of freshly distilled 2-methylpropanal in 5 mL of anhydrous diethyl ether, and place this solution in the separatory funnel with the stopcock closed. Cool the reaction flask containing the 1-butylmagnesium bromide in an ice-water bath and begin stirring. 

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