Graduation Semester and Year

2019

Language

English

Document Type

Thesis

Degree Name

Master of Science in Chemistry

Department

Chemistry and Biochemistry

First Advisor

Rasika Dias

Abstract

Organotrifluoroborates have gone from capturing the imagination of the scientific community to being used extensively in a host of applications ranging from being employed to study boron intermediates to being used as a means of introducing trifluoroborate moieties on molecules for custom chemical synthesis. There has been a lot of research done on the application of these molecules as reagents in carbon-carbon coupling reactions such as the Suzuki-Miyaura cross coupling reaction. Despite all of these efforts to understand the versatility of organotrifluoroborates, the possibility of using these molecules as potential ligands in transition metal complexes has not been extensively studied. The novelty of the concept of using these molecules as potential ligands encouraged us to explore the possibility of using coinage metal centers such as Cu(I) and Ag(I) and studying the structure and bonding properties of the resulting species. This thesis encapsulates the study of Ag(I) and Cu(I) complexes of trifluorovinylborates supported by two kinds of ligands. N-heterocyclic carbenes are useful as supporting ligands because their electron donating properties can be easily modified by changes made to their architecture and also have an influence on their steric properties by the imposition of geometrical constraints on the N-substituents. The other class of ligands that we were interested in using were pyrazoles, specifically bis(pyrazolyl)methanes, since their co-ordination properties can be easily varied by changing the substituents on the pyrazole ring. The electron donating properties of bis(pyrazolyl)methanes have been shown to be affected by the electron donating ability of the functional groups and the presence of bulky groups on the pyrazole ring which influence the sterics of co-ordination of the metal center with other ligands in the co-ordination sphere.

Keywords

Organotrifluoroborates, Co-ordination chemistry

Disciplines

Chemistry | Physical Sciences and Mathematics

Comments

Degree granted by The University of Texas at Arlington

Included in

Chemistry Commons

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