Lab 5 Free Radical Bromination

Lab 5 Free Radical Bromination - October 16, 2006 Locker:...

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October 16, 2006 Locker: D-15 Thursday 1:30PM-6:00PM Lab 5 – Relative Rates of Free Radical Bromination Purpose : In the free-radical chain bromination of hydrocarbons, a process of adding bromine to various hydrocarbons determines the relative reactivities of the hydrogens in C-H bond toward bromine atom. This process of bromination is useful in the lab because alkanes are chemically unreactive with most reagents and a free-radical chain bromination allows functional groups to be introduced into the alkane, allowing it to be more reactive to various reagents. By determining the different rates of bromination of the various hydrocarbons, this lab allows us to be able to see which hydrocarbon reacts the fastest and which reacts the slowest with bromine to create compounds with functional groups. Main Reaction: R-H + Br 2 R-Br + H-Br Br-Br heat Br• + Br• Br• + H-R R• + HBr Br• + Br-Br R-Br + Br• Table of Data: Attached Procedure : 1. Obtain fourteen test tubes into pairs and label each tube in the pair with the name or number of the hydrocarbon 8-13. 2.
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This note was uploaded on 04/17/2008 for the course CHEM V25. 0246 taught by Professor Callahan during the Fall '07 term at NYU.

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Lab 5 Free Radical Bromination - October 16, 2006 Locker:...

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