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Synthesis and Reactivity Studies of Square Pyramidal Complexes on Group 5 and 6 Metals for Nitrogen and Small Molecule Fixation

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dc.contributor.advisorLavoie, Gino G.
dc.creatorMorris, Richard S.
dc.date.accessioned2015-12-16T19:25:41Z
dc.date.available2015-12-16T19:25:41Z
dc.date.copyright2015-08-10
dc.date.issued2015-12-16
dc.date.updated2015-12-16T19:25:41Z
dc.degree.disciplineChemistry
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractI have completed work in the Lavoie Group which has resulted in the synthesis of new square pyramidal complexes supported by the tert-butyl-substituted (ethenediylidene)tetraphenoxide “TPO” ligand system. Complexes 6, 2,2',2",2"'-(1,2-ethenediylidene)tetrakis[4-tert-butylphenoxo] tantalum(V) ethoxide and 7, 2,2',2",2"'-(1,2-ethenediylidene)tetrakis[4-tert-butylphenoxo] tantalum(V) dimethylamide were synthesized and structurally characterized. Crystal structures confirmed that the geometry of complexes 6 and 7 is square pyramidal with the TPO ligand coordinating to tantalum slightly below the xy plane on which the metal resides. In addition, the ethoxo and dimethylamido ligands coordinate to tantalum on the z axis. Analyzing the X-ray structures gives valuable insight into pi-interactions between the metal center and the apical ligands. Bond lengths and angles from the structures indicate significant double bond character between the metal and the apical ligand. Reaction of (TPO)Ta(OEt) (6) and (TPO)Ta(NMe2) (7) with trimethylaluminum gave the methyl complex (TPO)Ta(CH3) (8). Bonding on complex 7 was further explored using density functional theory calculations.
dc.identifier.urihttp://hdl.handle.net/10315/30711
dc.language.isoen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectInorganic chemistry
dc.subject.keywordsTantalum
dc.subject.keywordssquare pyramidal
dc.subject.keywordscomplexes
dc.subject.keywordspi-interactions
dc.subject.keywords5-coordinate
dc.subject.keywordsinorganic
dc.subject.keywordsnitrogen-tantalum
dc.subject.keywordstantalum-oxygen
dc.subject.keywordsreactivities
dc.subject.keywordsDFT
dc.subject.keywordscomputation
dc.subject.keywordsmultiple-bonding
dc.subject.keywordsdouble-bonds
dc.subject.keywordsmethylation
dc.subject.keywordsgroup 5
dc.subject.keywordsmetals
dc.subject.keywordssigma-interations
dc.subject.keywordsprotonolysis
dc.subject.keywordsinsertion
dc.subject.keywordsamido
dc.subject.keywordsethoxide
dc.subject.keywordsmethyl
dc.subject.keywordschloro
dc.subject.keywordsgroup 6
dc.subject.keywordstransition metals
dc.subject.keywordsnitrogen
dc.subject.keywordssmall molecules
dc.subject.keywordspolymerization.
dc.titleSynthesis and Reactivity Studies of Square Pyramidal Complexes on Group 5 and 6 Metals for Nitrogen and Small Molecule Fixation
dc.typeElectronic Thesis or Dissertation

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