|
|
Article: Effective and regioselective iodination of arenes using iron(III) nitrate in the presence of tungstophosphoric acid.
- Article from:
- Canadian Journal of Chemistry
- Article date:
- October 1, 2005
- Author:
CopyrightCOPYRIGHT 2005 NRC Research Press. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Introduction
Heteropoly acids (HPAs) and their salts are useful acid and oxidation catalysts for various reactions and there are already many practical applications (1-3). One of the most interesting aspects may be the fact that they can be used in various kinds of reaction media or fields. Furthermore, they can be active solid acid catalysts and can provide unique reaction fields such as a pseudoliquid that is a "catalytically active solid solvent". HPA catalysts will find more green and sustainable applications in the future (4). Solid HPAs possess purely Bronsted acidity and are stronger than the usual mineral acids such as [H.sub.2]S[O.sub.4], HCl, ...
Related newspaper, magazine, and journal articles:
|
|
Article: Multifunction/shared aperture systems or smart skins now. ...
Journal of Electronic Defense;
January 1, 1991 ;
700+ words
... ... hemisphere within the X-[K.sub.u] bands to provide longrange ... wideband circuits plus narrowband HPAS, (2) wideband circuits plus ... The addition of narrowband HPAs somewhat ameliorates this problem ... e.g., multiple combined HPAs to achieve needed power output ...
|
|