Chemistry Commons^™

A Study Of Oxygen Functional Groups In Illinois Coal Fractions, Kenneth R. Osborne

Masters Theses

Ferric chloride/acetic anhydride reacted with butyl phenyl ether in acetonitrile at 80° to give a 75.6% yield of p-butoxyacetophenone. Reactions with benzyl aryl ethers gave 30% cleavage. The reaction of benzyl phenyl ether gave 10.3% p-benzyloxyacetophenone as well as cleavage product. Reaction of a pyridine soluble, toluene insoluble fraction (preasphaltene) of an Illinois No. 6 coal with ferric chloride/acetic anhydride in acetonitrile gave a product 94% insoluble in pyridine. The insolubility was ascribed to condensation reactions.

Phenols were measured in coals, preasphaltenes and preasphaltene derivatives by acetylation with acetic anhydride in pyridine. Suggestions for improvement in the method were presented. …

The Intermolecular Force Field Of Acetylene-Hcl: The Normal Coordinate And Centrifugal Distortion Analysis Of Two Weakly Bound Rigid Rods, Rebecca S. Lee

Masters Theses

In order to determine the intermolecular force field of C₂H₂⋅⋅HCl, a normal coordinate analysis appropriate for two weakly bound rigid rods is developed. An exact centrifugal distortion analysis is then carried out on the microwave spectrum of this "T''-shaped hydrogen-bonded π complex. The distortion constants and published matrix-isolated vibrational frequencies are employed in the normal coordinate analysis to obtain the intermolecular force field and refinements in the structural parameters. The following van der Waals force field is found to reproduce the existing spectroscopic constants of C₂H₂⋅⋅H³⁵Cl … . This study …

The Purification And Partial Characterization Of The Surface Polysaccharides From Three Fast-Growing Rhizobium Japonicum Strains, Madhav P. Yadav

Masters Theses

The fast-growing strains of R. japonicum were originally isolated from China. They are acid-producing Rhizobia and are capable of nodulating soybeans. These isolates share a common host-specificity (Peking soybean) with the slow-growing R. japonicum strains even though their biochemical properties are more closely related to other fast-growing Rhizobium species. The surface polysaccharides from three fast-growing R. japonicum strains--USDA201, USDA205, and HC205--were isolated and partially characterized. Strain HC205 is a nod⁻ mutant of USDA205 which lacks the symbiotic plasmid. These surface polysaccharides consist of extracellular, capsular and lipopolysaccharides (EPSs, CPSs and LPSs). The EPSs from all three strains are very similar …