CHEMICAL PROBLEMS

AMINOMETHYLATION OF HYDROXYACETONAFTONES

Oct 24, 2025 •

Aminomethylation of hydroxyacetonafton primary and secondary amines with excess of formaldehyde has been carried out. It revealed that the use of secondary amines 1-hydroxy-2- and 1-hydroxy-4-acetonaftone makes it possible to obtain directly the aminomethyl derivatives, and while amines 1-hydroxy-2-acetonaftones do not expose to the Mannich reaction with primary aromatic amines, 1-hydroxy-4-acetonaftones with primary aromatic amines […]

ANALYSIS OF FLAVONOIDS OF CUSCUTA CAPULATA

Oct 24, 2025 •

Flavonoid composition of the Cuscuta capulata plant has been studied with the purpose of finding out new sources of biologically active ioin. Apigenin, kempferol, kempferol-3-O-D-galaktopiranozid (trifolin) flavonoids were obtained from the raw material laid in the surroundings of Baku at the end of June, 2006. The identification these ioin chemical spektral and khromatografik features has […]

DRY PASTING MIXTURES FOR CERAMIC PLATES

Oct 24, 2025 •

The influence of Culminal 9115 polymer on physical-mechanical properties of dry adhesive building mixtures has been traced. It revealed that Culminal 9115 improve adhesive solidity of adhesive compound. When adding polyvinylacetate, solidity of adhesion rises from 7 MPa to 11 MPa.

THE INFLUENCE OF ELEMENT Pr ON PHYSICO-CHEMICAL PROPERTIES OF SOLID SOLUTION (Sb2Te3+Bi2Te3+Se+Te) of “p”-TYPE

Oct 24, 2025 •

The phase microdiagram of the (Sb2Te3+Bi2Te3+Se+Te)1-х(Pr)х system has been studied using differential thermal analysis, X-ray diffraction, microstructural analysis, and microhardness and density measurements. The influence of Pr element on physico-chemical properties of solid solution (Sb2Te3+Bi2Te3+Se+Te) of “p”-type analysed. At room temperature, the (Sb2Te3+Bi2Te3+Se+Te) based solid solution extends to 4 at. % Pr

ON OBTAINING OF PENTACARBONILRENIUM (I) CHLORID PROCEEDING FROM K2ReCl6 SALT

Oct 24, 2025 •

A reaction of interaction between hexachlorenat of K2ReCl6 and a mixture of sulphuril and formic acids taken as 1:2 has been studied. it was established that during this reaction at 100–1100C temperature within 3 hours, no restoration of the salt K2ReCl6 to (CO)5Re(I)Cl was observed. Within IR-spectrum of reaction product there are missing lines of […]

SPECTROPHOTOMETRIC RESEARCH INTO POLYLIGAND COMPLEX OF MO (VI) WITH 2,3,4-TRIOXY-4′ SULFOAZOBENZENE AND TRITON X-114

Oct 24, 2025 •

By spectrophotometric method, compex formation of molybdenum (VI) with 2,3,4- trioxy-4’—sulfoazobenzene in the presence of non-ionic surface-active substances-triton X-114 has been studied. It has been established, that the polyligand complex with proportion 1:1:1, is formed in 0.1 M HCl medium and light absorbtion in λ=490 nm. Compliance with Beer’s law is carried out in an […]