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Grignard Reagent.
Member rating: No Rating | Words: | Submitted: Mon Feb 02 2004
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Grignard Reagent - Scott Gavin. Theory: Grignard reagents are members of the organometallic compounds and happen to be one of the most useful. Grignard reagents are used mainly for the preparation of secondary and tertiary alcohol's and in the synthesis of alkyl or aryl derivatives. They are given the general formula RMgX, where R = an alkyl group and X = Bromine or Iodine. As the general formula suggests, Grignard reagents are prepared from magnesium in dry ether (To exclude water completely) and bromo or iodo alkane. The name Grignard is from the French chemist Francois Victor Grignard. Method: A 50cm3 pear shaped flask was placed in a 100?C oven for an hour to remove any trace of moisture. 2cm3 of dry bromobenzene, 0.5g of magnesium turnings and 15cm3 of sodium dried ether were added to the pear shaped flask in a fume cupboard. A condenser was then fitted and one small iodine crystal added...
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