This study deals with the (4+2)-cycloaddition reactions of 4-π electron compounds with ketenes. Chloroketenes were generated in situ from the corresponding chlorinated acid chlorides in the presence of the ketenophiles. Chloro-, dichloro- and diphenylketenes reacted with 1-methoxy-3-trimethylsiloxy-l,3-butadiene, and 2,4-bis(trimethylsiloxy)-1,3-pentadiene to yield the corresponding dihydropyrans. The dihydropyrans yielded substituted 4-pyranones on hydrolysis.

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

This article provides comments on "Generalized corresponding-states method for the prediction of surface tension of pure liquids and liquid mixtures," published in the 'Journal of Colloid and Interface Science' in 1982.

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

This article provides comments on "Thermochemical Investigations of Associated Solutions: Calculation of Solute-Solvent Equilibrium Constants from Solubility Measurements," published in the Journal of Pharmaceutical Sciences in 1983.

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.

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

Article on a kinetic study of the reactions of ground-state sodium atoms with the molecules CF₃Cl, CF₂Cl₂, CFCl₃, CF₃Br and SF₆ over the temperature range 644-918 K.

Article on the determination of the absolute second-order rate constant for the reaction Na + O₃ → NaO + O₂.

Article on enthalpies of combustion of four N-phenylmethylene benzenamine N-oxide derivatives, of N-phenylmethylene benzenamine, and of trans-diphenyldiazene N-oxide and the dissociation enthalpy of the (N-O) bonds.

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

This article discusses excess molar volumes of binary mixtures of cyclohexane and y-butyrolactone with aromatic hydrocarbons.

Article on experimental artifacts and determination of accurate Py values.

A study has been conducted for the qualitative and Quantitative analysis of chlorinated organic compounds in water. The study included the adaptation of Amberlite XAD macroreticular resin techniques for the concentration of municipal wastewater samples, followed by GC/MS analysis. A new analytical method was developed for the determination of volatile halogenated organics using liquid-liquid extraction and electron capture gas chromatography. And, a computer program was written which searches raw GC/MS computer files for halogen-containing organic compounds.

Article on high-temperature fast-flow reactor kinetics studies of the reactions of aluminum with chlorine, aluminum with hydrogen chloride and aluminum monochloride with chlorine over wide temperature ranges.

Article on high-temperature photochemistry and BAC-MP4 studies of the reaction between ground-state H atoms and N2O.

Article on high-temperature photochemistry kinetics studies of the reactions of hydrogen atom(1²S) and deuterium atom (1²S) with nitrous oxide.

Article on a high-temperature photochemistry kinetics study of the reaction of oxygen(³P) atoms with ethylene from 290 to 1510 K.

Article on a high-temperature photochemistry study of the deuterium atom + ammonium-d3 reaction.

Article on HTP kinetics studies of the reaction of O(2(3)Pj) atoms with H2 and D2 over wide temperature ranges.

Article on an HTP kinetics study of the reaction between ground-state H atoms and NH₃ from 500 to 1140 K.

Article discussing hydrolysis reactions in lamellar liquid crystalline media and octanol/water partition coefficients.

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.

Article on isentropic compressibility of an ideal ternary solution.