the aim of this paper is to study the high order difference scheme for the solution of a fractional partial differential equation (pde) in the electroanalytical chemistry. the space fractional derivative is described in the riemann-liouville sense. in the proposed scheme we discretize the space derivative with a fourth-order compact scheme and use the grunwald- letnikov discretization of the ri...

The melt-phase synthesis of dioctyltin (IV) and triphenyltin (IV) benzoates were carried outusing stoichiometric amounts of benzoic acids and the corresponding organotin (IV) compounds.The reagents were ground together in a mortar and fed into a boiling glass tube. A cannula tubewas inserted into the boiling tube to discharge accumulated gaseous products. A syringe ensureda continuous flow of d...

The substitution of ligands in octahedral metal complexes is the most extensively mechanistically studied inorganic reaction. It is of fundamental importance, and a number of important observations and results are found. Substitution in octahedral systems was initially studied for classical coordination complexes in aqueous solutions. More recently some important observations have been made reg...

The form in which bilirubin exists in the blood is of considerable interest because of the observed differences in the van den Bergh reaction in disease and because of the relation of bilirubin to hemoglobin metabolism. All of the bilirubin in plasma reacts in 30 minutes with diazonium salts in acid 50 per cent methyl alcohol to give a red dye (1). A variable fraction of the total reacts with v...

This Focus Review provides an overview of the design and fabrication of new families of molecular electronic devices where reaction chemistry is an efficient means for covalently bridging the nanogaps between separated contacts. In each case ever-reducing top-down device fabrication existing in the silicon-based semiconductor industry is tailored to meet the requirements of ever-expanding lengt...

The origin of life on Earth is widely believed to have required the reactions of organic compounds and their self- and/or environmental organization. What those compounds were remains open to debate, as do the environment in and process or processes by which they became organized. Prebiotic chemistry is the systematic organized study of these phenomena. It is difficult to study poorly defined p...

A new approach to synthetic chemistry is performed in ultraminiaturized, nanofabricated reaction chambers. Using lithographically defined nanowells, we achieve single-point covalent chemistry on hundreds of individual carbon nanotube transistors, providing robust statistics and unprecedented spatial resolution in adduct position. Each device acts as a sensor to detect, in real-time and through ...

One-pot reaction of aldehydes or ketons with aniline derivatives was performed using NaBH4 and Fe3O4 magnetic nanoparticles (MNPs). The optimum amount of Fe3O4 MNPs was 5 mol% under solvent free condition. The corresponding products were obtained in good to excellent yields. The magnetically recoverable iron oxide nanoparticles are found to be efficient for synthesis of amine derivatives. These...

The lignan paulownin was prepared in a seven-step route from piperonal. The key step was a type I1 photocyclization reaction wherein two of the four stereogenic centers were introduced. Disciplines Chemistry | Organic Chemistry | Other Chemistry | Polymer Chemistry