Take care to be sure that the syringe needle you are given is dry. Since
you will probably be given a needle with a plastic attachment point, do
not place it in the oven. Instead, force a little acetone through the
needle using an acetone squirt bottle, followed by a gentle stream of air.
It is disastrous for a Grignard reaction to use a needle that has water
trapped inside it.
Dry ice will be provided near the Organic Dispensing Hood. There will
probably be a mallet of some sort and a cloth bag for crushing the dry
ice. At the time when you need the dry ice (not before), quickly measure
roughly one gram of CO2, place it inside the cloth, and crush it with
the mallet. Use the resulting powder for the reaction.
All for now,
CBF
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Craig B. Fryhle, Ph.D. Office 206-535-8314 FAX 206-536-5055
Associate Professor Email fryhle@u.washington.edu
Department of Chemistry URL http://rainier.chem.plu.edu/fryhle.html
Pacific Lutheran University
Tacoma, Washington 98447 ^ ^ ^ ^ ^ ^
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