Systematic Studies on the Chelating Ligand Effects
of Novel Borafluoronium Ions
Name
Allen-villarde-master-chemistry-2024-thesis.pdf
Description
Thesis PDF
Size
2.53 MB
Format
Adobe PDF
Checksum (MD5)
ac1d26ce3f6803f0d936bbe65bc5b2d2
Author(s)
Allen, Marissa D.
Advisor(s)
Gilliard Jr., Robert J.
Date Issued
September 2024
Publisher
Massachusetts Institute of Technology
Abstract
This study explores the synthesis and characterization of borafluoronium ions via a ligand-based strategy using bidentate amine and phosphine bases as chelating agents to cationic boronium ions.The borafluoronium complexes A–C were synthesized in high yields (80%–95%) and characterized using NMR spectroscopy and single crystal X-ray diffraction. Further investigations into the coordination of other bisphosphine ligands, such as dppe, rac-BINAP, and Xantphos, resulted in the formation of Lewis adducts rather than the desired borafluoronium ions. The challenges in isolating these species are attributed to steric and chelate effects inherent of the ligands, with NMR analysis providing insights into the coordination chemistry and stability of these complexes.This work advances the understanding of borafluoroniumion formation and the impact of ligand structure on their properties.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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