The effect of gemini surfactants on the kinetics and mechanism of ninhydrin-DL-tryptophan reaction indicate that formation of larger micellar aggregates are responsible for rate enhancement.

Our study on TMA-(benzene)_n (n = 1–4) complexes revealed a cation could stably sit in an aromatic cage. The more the cage has aromatic monomers, the stronger the binding strength. In details, additivities of both the geometries and the binding energies were observed, providing an easy and accurate way to evaluate the binding between a cationic ligand and an aromatic cage in protein.

The popular DSP correlation with σ_I and σ_R was revised using the DFT-calculated acidities and some experimental data from the literature. The DSP treatment is acceptable only for donor substituents, for acceptors there is no dependence on σ_R.

4-ethoxycarbonylmethyl-1-(4-methyl-1,2, 3-thiadiazol-5-ylcarbonyl) thiosemicarbazide undergoes cyclization in a single step to 4-methyl-N-(4-oxo-2-thioxoimidazolidin-3-yl)-1,2,3-thiadiazole-5-carboxamide under reflux conditions in anhydrous acetic acid.

The study of the complex formation of 3,3-diphenyl-3H-benzo[f]chromenes containing aza-18-crown-6-ether, diaza-18-crown-6-ether or morpholine units with alkali, alkaline earth, heavy and transition metal cations in acetonitrile is reported.

Reactivities of acridine derivatives (1a⁺, 1b⁺, 1c⁺) have been compared quantitatively for hydride transfer reactions with, 2Ha–h. Each of acridine derivatives gives a linear Brønsted plot for hydride transfer reactions. The experimental slopes were compared with those obtained by Marcus theory.

The strength of the NO bonds in two 2-R-3-methylquinoxaline-1,4-dioxides is presented. NO bond dissociation enthalpies are not associated to NO bond lengths. NO bond strength is correlated with the type of atoms in the substituent directly attacted to the quinoxaline ring but not by the group's stereoelectronic characteristics.

The interaction of estrone and estradiol with β-cyclodextrins was investigated by differential pulse voltammetry and high-performance liquid chromatography in mixed media. Differences in association constant of these steroids with β-cyclodextrin and co-solvent effect are discussed.

The complexation of L and D enantiomers of phenylglycine, phenylalanine and tryptophan with D-mannonaphto-crown-6-ether was studied by NMR and ITC in methanol solution at 298.15 K. The thermodynamic parameters, K_s, ΔG, ΔH°, and TΔS were determined with the aid of ITC. In contrast to aqueous medium, the chiral discrimination is observed.

The regio- and stereoselectivity of some Paternó-Büchi reactions are studied within a density functional framework with B3LYP exchange-correlation energy functional and 6-31G** basis set.

Addition-elimination pathway proposed.