Amylene.docx

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UNIVERSITY OF BALAMAND Faculty of Sciences Department of Chemistry Organic Chemistry Laboratory I Names: Lara Frangieh Anthony Dahdah Nayla Mouawad Experiment Title: The Amylenes: 2-methyl-2-butene Experiment #: 8 Date: 6/12/10 Submitted to: Dr. Ghassan Bechara 1
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Introduction: Amylene is a generic term applied to the alkenes of formula C 5 H 10 . All of the Amylenes are well known, readily available compounds. We will prepare in this experiment a kind of Amylene: 2-methyl-2-butene starting from a common amyl alcohol: t-amyl alcohol (2-methyl-2-butanol) with density equal to 0.815g/cm 3 . This is a dehydration reaction that could proceed in two ways to give 2 products but the major one is represented by the mechanism later. In fact, this is a specific example of the acid catalyzed dehydration of alcohols in which the hydrogen atom will be removed from the adjacent carbon atom. The product is removed from the reaction mixture by fractional distillation as the reaction proceeds. Note that dehydrating a tertiary alcohol is easier that the secondary one. The purpose of this experiment is to prepare a specific form of the Amylenes which is: 2-methyl-2-butene with density equal to 0.662g/cm 3 . Chemicals Used: Sulfuric acid H 2 SO 4 (14 ml) Distilled water. T-amyl alcohol (27 ml) 10% of NaOH (10 ml) CaCl 2 Aqueous permanganate solution 2
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Equipments used: Round bottom flask
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