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Professor Brian Frost

The Frost group has a longstanding interest in aqueous phase organometallic chemistry with an emphasis on water-soluble phosphine ligands. One focus of this research group has been centered on the chemistry of the neutral, air stable, and water-soluble heterocyclic phosphine 1,3,5-Triaza-7-phosphaadamantane (PTA). PTA is a small phosphine ligands with a cone angle of ~103°. PTA binds metal centers quite strongly and is electronically more donating than PPh3. Ruthenium complexes of PTA have exhibited impressive anticancer activity. A wide variety of transition metal complexes of PTA have been utilized as catalysts for reactions such as hydrogenation, C-C bond forming reactions, atom transfer radical addition, and nitrile hydration.

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Gene W Wong, Jennifer L Harkreader, Charles A Mebi, Brian J Frost
Inorganic Chemistry 2006-08-21
The upper rim of 1,3,5-triaza-7-phosphaadamantane (PTA) has been modified for the first time. Lithiation of PTA, with n-butyllithium, resulted in deprotonation of an alpha-phosphorus methylene and the formation of 1,3,5-triaza-7-phosphaadamantane-6-yllithium (PTA-Li). The chiral chelating phosphine 6-(diphenylphosphino)-1,3,5-tr...Read More
Brian J Frost, Carolyn M Bautista, Rongcai Huang, Jason Shearer
Inorganic Chemistry 2006-05-01
The structures of two manganese(II) complexes of 1,3,5-triaza-7-phosphaadamantane (PTA) reveal the first transition-metal complexes of PTA in which the metal preferentially coordinates to a nitrogen and not the phosphorus of PTA. The coordination environment about the manganese was probed using X-ray crystallography (solid state...Read More