Recently, tris(triazolyl)borate (Ttz) ligands have emerged as a way to model various enzymes. They offer improved water solubility and differing electronic structure from their tris(pyrazolyl)borate (Tp) counterparts. The addition of an acid to the copper (I) carbonyl species of the ligand alters the electronics, presumably by binding at the third nitrogen on the triazole ring, and decreases its ability to serve as an electron donor. Infrared spectroscopy allows for the changing electronic properties to be measured by observing the CO stretch. As the stoichiometric ratio of acid to ligand increases, the CO stretch shifts as well. The reversibility of the reaction can be demonstrated upon addition of a base in which the CO stretch shifts to its original position in solution. The ability of the ligand to act as a �switch� at this location on the triazole ring offers practical application in regards to a potential role in catalysis.

Using carbon monoxide (CO) as a probe to study the electronic properties of copper (I) tris(triazolyl)borate

243rd National Meeting (2012)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.