Date: Fri, 10 Mar 2006 14:32:31 -0500
Reply-To: ILPI <info**At_Symbol_Here**ILPI.COM>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ILPI <info**At_Symbol_Here**ILPI.COM>
Subject: Re: Questions out of my realm
Comments: cc: DanielD734**At_Symbol_Here**AOL.COM
In-Reply-To: <253.7c86653.31432883**At_Symbol_Here**>

>A safer butyl lithium quench:
>Slowly add the butyl lithium ( using a double tipped needle with nitrogen 
>pressure) to crushed dry ice. The butyl group adds to CO2 and forms 
>the lithium
>salt of pentanoic acid. The dry ice also keeps everything very cold.

Yes, this is another good method.  And is also great for most other 

I found a 25 mL vial with some crusty tape on around the cap in the 
back of the hood I inherited at MIT.  No label.  I picked it up and a 
piece of the crust fell off.  Out shot this magnificent blue flame 
about 3" long.  The opening crusted up and the flame shut off.   Best 
guess is that it was diethyl zinc.

As there was no safe or easy way to open the vial and we didn't know 
what it was, I crushed up a couple pounds of dry ice into a powder, 
nestled the vial in the middle, covered it with more crushed dry ice, 
and then crushed the vial.   Flawless.  No flame, no issues.

Safety Emporium - Lab & Safety Supplies featuring brand names
you know and trust.  Visit us at
esales**At_Symbol_Here**  or toll-free: (866) 326-5412
Fax: (859) 523-0606, 4905 Waynes Blvd, Lexington, KY 40513-1469

Previous post   |  Top of Page   |   Next post

The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.