Article commenting on the prediction of gas chromatographic retention behavior with mixed liquid phases.

Article discussing Py and BPe solvent polarity scales and the effect of temperature on pyrene and benzo[ghi]perylene fluorescence spectra.

Article on experimental artifacts and determination of accurate Py values.

Article on benzo[ghi]perylene versus pyrene as solute probes for polarity determination of liquid organic salts used in chromatography.

Article discussing polycyclic aromatic hydrocarbon solute probes and the effect of solvent polarity on the fluorescence emission fine structures of coronene derivatives.

This article discusses the effect of solvent polarity on the fluorescence emission fine structures of coronene derivatives.

This article presents the non-linear least-squares routine KPS1 for the analysis of data from counting experiments which follow single exponential decays.

Article on polycyclic aromatic hydrocarbon solute probes and the effect of solvent polarity on the ovalene and benzo[ghi]perylene fluorescence emission fine structures.

Article on the estimation of the effective dielectric constant of cyclodextrin cavities based on the fluorescence properties of pyrene-3-carboxaldehyde.

Article on polycyclic aromatic hydrocarbon solute probes and fluorescence emission spectra of pyrene, ovalene, benzo[ghi]perylene, and coronene dissolved in liquid tetrabutylammonium sulfonate salts.

Article on polycyclic aromatic hydrocarbon solute probes and fluorescence spectra of pyrene, ovalene, coronene, and benzo[ghi]perylene dissolved in liquid alkylammonium thiocyanate organic salts.

Article on polycyclic aromatic hydrocarbon solute probes and the effect of dissolved oxygen and halogenated solvents on the emission spectra of select probe molecules.

Article on polycyclic aromatic hydrocarbon solute probes and the effect of solvent polarity on the fluorescence emission fine structures of select pyrene and pentaphene derivatives.

Article on the correlation and estimation of aqueous solubilities of polycyclic aromatic hydrocarbons.

This study consists of four major areas of research. First, the relationship between and was extended to Lrl nil homoallylic couplings and was used to determine the relative degree of puckering in a series of dihydroaromatic carboxylic acids. Second, the effect of coupling contributions transmitted through space were examined by theoretical calculations of the intermediate neglect of differential overlap finite perturbation theory type (INDO-FPT) including selective overlap reduction experiments to determine the sign and magnitude of the major through-space contributions and the effect of the orientation of the substituent upon the vicinal carbon3 carbon coupling. Third, the dependence of the J upon substituent orientation in norbornanes was empirically investigated by the synthesis of a series of lactones and cyclic ethers whose conformation was rigid and known. Fourth, a large number of norbornanes substituted with methyls in the 1, 3, and 7 position and a carbon-13 labeled substituent in the 2 position were synthesized and studied in order to obtain a variety of vicinal C-C couplings; all the NMR parameters for this series of compounds were determined while the carbon13 labeled substituent was varied from methyl to methylene to carbinol to aldehyde and to carboxylic acid.

The body of information concerning carbon-carbon spin-spin coupling constants now includes a large number of coupling constants, the establishment of a dihedral angular dependence on 3JCC, and the application of 3JCC to conformational analysis. This study adds another dimension to the growing wealth of information associated with 13 C-NMR: the influence of some non-bonded interactions on 3JCC Four types of non-bonded interactions that could influence vicinal carbon-carbon NMR coupling constants were investigated. To facilitate the NMR studies, a variety of 13C-labeled compounds were synthesized.

The purpose of this investigation was to study the chemistry of the new and novel (trimethylsilyl)ketene. This ketene was synthesized by pyrolysis of (trimethylsilyl)ethoxyacetylene which was prepared from ethoxyacetylene and methyllithium. (Trimethylsilyl)ketene is a very stable and isolable ketene which does not dimerize and, therefore, provides an opportunity for some unique studies that have not been possible with other monosubstituted ketene.