ELECTROPHILIC ADDITION

PURPOSE
The purpose of this lab is to learn how to synthesize 2-methyl-2-butene into 2-bromo-2-methylbutane using addition of hydrogen bromide.

THEORY



Chemical Compound Molecular Formula Molecular Weight Boiling Point Melting Point Density
Amylene CH3CH=C(CH3)2 70.13 g/mol 36 oC -134 oC 0.662 g/ml
Hydrobromic Acid HBr 80.91 g/mol 126 oC -11 oC 1.490 g/ml
2-Bromo-2-MethylButane C5H11Br 151.05 g/mol 107 oC 1.18 g/ml
Sodium bicarbonate NaHCO3 84.007 g/mol Decomposes at melting point unknown 2.159 g/ml
Diethyl ether C2H5OC2H5 74.12 g/mol 34.6 °C −116.3 °C 0.7134 g/ml

In this lab we use electrophilic addition of a hydrogen halide to an alkene to make 2-bromo-2-methylbutane. Electrophilic addition is an addition reaction where a pi bond is removed to create two new covalent bonds, Y-Z + C=C → Y-C-C-Z. Electrophilic addictions can also be the reverse of dehydrohalogenation. Dehydrohalogenation is when a double bond is formed......

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Title: Electrophilic Addition
Approximate Word Count: 668
Approximate Pages: 3 (250 words per double-spaced page)

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