Date of Award
2008
Publication Type
Doctoral Thesis
Degree Name
Ph.D.
Department
Chemistry and Biochemistry
Keywords
Pure sciences, Hafnium, Lewis acids, Phosphinimide, Titanium
Supervisor
Doug Stephan
Rights
info:eu-repo/semantics/openAccess
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Abstract
The study of the chemistry of phosphinimine incorporating a Lewis acid fragment has been investigated. These compounds form stable heterocycles containing P-N-B-C elements such as [(C6F5)2BCH 2]t-Bu2PNSiMe3 as evidenced by X-ray crystallography.
The syntheses of linked (phosphinimide-cyclopentadienyl) complexes of titanium have been achieved using olefin metathesis. These compounds exhibited high activity in olefin polymerization when activated with MAO or B containing activators. Other titanium complexes containing linked ( bis-phosphinimide) ligands and non-linked ligands have been prepared as well. Based on polymerization testing, the link shows no effect on activity.
The chemistry of phosphinimide complexes of hafnium has been studied. A few complexes were prepared having one, two and three phosphinimide ligands. When cyclopentadienyl ligand was introduced, ligand disproportionation has been observed. Only sterically bulky cyclopentadienyl groups form stable complexes. The reactivity of some compounds toward Lewis acids such as B(C6F 5)3 or HB(C6F5)2 as well as ethylene polymerization testing have been explored.
Recommended Citation
Alhomaidan, Osamah Yacoub, "Main group and early transition metal phosphinimide complexes" (2008). Electronic Theses and Dissertations. 8064.
https://scholar.uwindsor.ca/etd/8064