diiododecane: thermal stability

[Clare McCarthy]

I am using diiododecane and iodododecane as contrast enhancers(dope-ing
agents) in heavy oil for use in a CT scanner. I have been having problems at
higher temperatures, 150-200C, my concerns being that these compounds are
decomposing and/or reacting with components in the oil.

Any comments/suggestions would be appreciated

___________________________________________________________________

Mr Clare McCarthy Alberta Research Council
Technologist Heavy Oil and Bitumen(Cloverbar)
mcca...@arc.ab.ca ph. (403)913-9939, 450-4616
http:\\www.arc.ab.ca fax (403)472-6912
___________________________________________________________________

[Alan "Uncle Al" Schwartz]

mcca...@arc.ab.ca (Clare McCarthy) wrote:
>
>I am using diiododecane and iodododecane as contrast enhancers(dope-ing
>agents) in heavy oil for use in a CT scanner. I have been having problems at
>higher temperatures, 150-200C, my concerns being that these compounds are
>decomposing and/or reacting with components in the oil.
>
>Any comments/suggestions would be appreciated

Iodoalkanes in general are labile toward oxidation, thermolysis,
photolysis, and nucleophilic displacement in general (especially nitrogen
and sulfur). Perfluoroiodoalkanes are quite chemically inert except
toward free radical activation. However, they have very diffferent
solvent parameters from alkanes and may not be miscible.

Perhaps tin or bismuthyl soaps would give you the required contrast and
solubility with thermal stability.

--
Alan "Uncle Al" Schwartz
Uncl...@ix.netcom.com ("zero" before "@")
http://www.netprophet.co.nz/uncleal/ (naughty beyond measure;
"Quis custudiet ipsos custodes?" The Net! funny beyond endurance)