| RESEARCH |
"Jerry discovered that nearly any type of substituent group desired could be incorporated into the pyrazole rings," noted Gerard Parkin, a chemistry professor at Columbia University and a symposium co-organizer. "That meant that one could completely tailor the chemistry of the ligand system. At that point, many others started to become interested in the ligands and the field just blossomed. "Symposia where people get together to celebrate the work of a researcher are not uncommon," Parkin added. "However, these events usually involve a group of colleagues and former students getting together when someone wins an award. But Jerry has never had any students, and in this case he hasn't won an award. Still, he has had a very important impact on the inorganic community." In the late 1980s, Trofimenko helped Parkin, a new assistant professor, get started working with Tp ligands by providing him with samples of ligands and reagents. Parkin was one of the first researchers to explore the second-generation TptBu ligands, which he used to stabilize magnesium alkyl compounds for use as Grignard reagents. Parkin described his group's work on tris[(2-indole)methyl]amine, which is a trianionic tetradentate ligand that, like the Tp ligands, coordinates to metals through heterocyclic nitrogen atoms. Much work has been done to study strong -donor ligands such as tris(amidoethyl)amine for enhanced stabilization of high-oxidation-state transition metals, Parkin noted. But he wanted to find a heterocycle-containing ligand system that had a slightly reduced -donor ability. He showed that the indole ligands are efficient for forming tantalum amido and imido complexes [Inorg. Chem., 42, 264 (2003)]. |
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