Dieckmann cyclisation of some β,γ-unsaturated dimethyl esters—II

Further studies of Dieckmann cyclisation are described based on unsaturated heptanedioic acid diesters 1 and 9.     

B−L non-conserving proton decay in guts

It is shown that B?L non-conserving proton decay (p→e^?π⁺π⁺ etc.) is allowed through gauge boson mixing in both SO(10) and E(6) GUTs, but not in the SU(5) GUT. The lifetime for this decay mode is estimated.     

On L-fuzzy topological spaces

L-fuzzy sets and, subsequently, L-fuzzy topological spaces are considered in this paper, where L is a complete and completely distributive non-atomic Boolean algebra. A few separation properties as well as subspace L-fuzzy topology are defined here, in the light of an earlier paper. These are more similar to ordinary topological spaces than to fuzzy topological spaces.     

Studies on nessler's reagent part I

The nature of the reaction between [HgI₄]^-2 and OH^- ions, which are the components of the Nessler's reagent, has been. studied and established as

, by determining the concentration of iodide ions formed in the solution, potentiometrically from the concentration cells of iodide-hypoiodite system. The equilibrium constant has also been calculated and found to be lo^-3.26.     

Approach to geminally alkylated azaphthalans via a consecutive double desilylation-alkylation reaction: application to a synthesis of cerpegin

A new approach to geminally alkylated azaphthalans and an application of this chemistry to the synthesis of the pyridone alkaloid, cerpegin, is reported.     

Oxoanionic or sulfur lone pair attack? The difference in reactivity of hydrogensulfite anion and neutral dimethylsulfite towards [Bu4N]2[MoO2(S2C2)CN)2)2] in the model reductive half reaction of sulfite oxidase

pH dependent reactivity differences of dimethylsulfite towards the title complex 1 demonstrate the crucial need of oxo-anionic coordination of sulfite to the molybdenum centre of 1 in the model reductive half reaction of sulfite oxidase.     

Archimedean Synthesis and Magic Numbers: "Sizing" Giant Molybdenum-Oxide-Based Molecular Spheres of the Keplerate Type

Pythagorean harmony can be found in the spherical polyoxometalate clusters described here (see illustration for an example of a structure), since there are interesting relationships between the so-called magic numbers (12, 32, 42, 72, 132) relevant for spherical viruses and the number of the building blocks in the cluster. The size of these Keplerate clusters can be tailored by varying the type of connections between the pentagons by means of different spacers.     

K X-ray emission spectra from ν-Al2O3

Summary η-Al₂O₃ sample was bombarded with 12.5 keV electron.K X-ray spectra of this sample were compared with those of pure Al and α-Al₂O₃.