Document Type

Thesis

Date of Award

5-1990

School/College

College of Science, Engineering, and Technology (COSET)

Degree Name

MS in Chemistry

First Advisor

Bobby L. Wilson

Abstract

One mole of titanium tetrabromide reacts with four moles of potassium dihydrobis(pyrazolyl)borate to give eight-coordinated Ti[H2B(Pz)2]4' Analytical measurements characterize the complex. The infrared spectrum indicates that [H2B(Pz)2r is bidentate. The ratio of the protons in the NMR spectrum proves eight coordinations in Ti[H2B(Pz)2]4' One mole of titanium tetrabromide reacts with two moles of potassium dihydrobis(pyrazolyl)borate to give six-coordinated Ti[H2 B (Pz) 2]2 B ra- The infrared spectrum supports the bidentate nature of [H2B(Pz)2]-' NMR spectrum also indicates bidentate character of ligand with two doublets and a triplet which could be assigned to ligand. Coal liquefaction has been found an effective and viable method to produce liquid fuel as an alternative source of energy. Depletion of petroleum deposits has increased the importance of coal liquefaction process. There is increased interest in coal liquefaction research. Two titanium complexes dibromobis[dihydrobis(pyrazolyl)borate]titanium(IV) and tetrakis[dihydrobis(pyrazolyl)borate]titanium(IV) are evaluated as coal liquefaction catalyst. Effectiveness of liquefaction process is evaluated by the percentage conversion in two solvents, cyclohexane and tetrahydrofuran. The conversions are compared with the conversions by a standard catalyst ammonium molybdate. It has been found that titanium complexes with potassium dihydrobis(pyrazolyl)borate give better liquid conversions than the standard ammonium molybdate

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