Are the Ligands Talking? Exploring Possible Ligand to Ligand Communication in a Seven Coordinate Metal Complex

Cody Carley Butler University
Faculty Sponsor(s): Stacy O'Reilly Butler University
A series of tungsten and molybdenum complexes were synthesized in order to study intramolecular communication. Varieties of the tris(pyrazolyl)methane with different electron donating abilities were synthesized and procedures were optimized. Metal tricarbonyl complexes of the ligands were synthesized and additional ligands such as hydride or iodide were coordinated to the central metal to construct cationic seven-coordinate complexes. NMR spectroscopy was used to analyze the chemical environment of the hydrogen on the tris(pyrazolyl)methane substituent. Depending on the substitution pattern of the tris(pyrazolyl)methane ligand large differences in the chemical shift of the central hydrogen of the tris(pyrazolyl)methane ligand were observed. The changes can be attributed to the difference in electron density of the added hydride or halide ligand.
Chemistry
Oral Presentation

When & Where

09:15 AM
Gallahue Hall 101