Analysis of the composite materials having a structure of the mineral fibers based on the non-invasive spectroscopic methods
Category Archives: Year 2015 Issue 7
Structural studies of cyclic β-amino ketons using computational and NMR methods
Structural studies of cyclic β-amino ketons using computational and NMR methods SIDOROWICZ K., ŁAŹNY R.
Please cite as: CHEMIK 2015, 69, 7, 401–410 Because of pyramidal configuration of the nitrogen atom, tropanes, granatanes, and their derivatives can exist in two stereoisomeric forms, in which N-substituents can be oriented axial or equatorial with respect to the piperidone ring. The N-invertomer stereochemistry of N-substituted bicyclic β-amino ketones has been investigated using experimental, and theoretical methods, such as NMR, microwave...Conjugated nitroalkenes as components of nonconcerted Diels-Alder reactions – recent studies
Conjugated nitroalkenes as components of nonconcerted Diels-Alder reactions – recent studies JASIŃSKA E., DRESLER E. ŁAPCZUK-KRYGIER A., KĄCKA A., NOWAKOWSKA-BOGDAN E., JASIŃSKI R.
Please cite as: CHEMIK 2015, 69, 7, 395–400 In the publication the recent progres concerning non-concerted Diels-Alder reactions with conjugated nitroalkenes has been discussed. Keywords: Nitroalkenes , Diels-Alder reaction, cycloaddition reaction, mechanizm Read more in pdf
...
Vitrimers – the miracle polymer materials combining the properties of glass and plastic?
Vitrimers – the miracle polymer materials combining the properties of glass and plastic? JUROWSKA A., JUROWSKI K.
Please cite as: CHEMIK 2015, 69, 7, 389–394 Vitrimers are a new class of polymer materials invented by Ludwik Leibler (Polish-born chemist) and his co-workers from France. This class of polymers has highly desirable properties, combining reparability and malleability at high temperatures with insolubility. These compounds can be understood as strong organic glass formers with covalent networks that are able to...Electrodeposition Coatings – the perfect symbiosis of water/electro/paint chemistry
Electrodeposition Coatings – the perfect symbiosis of water/electro/paint chemistry BROCK T.
Please cite as: CHEMIK 2015, 69, 7, 383–388 Electrodeposition coatings are – since 5 decades – the basis for good corrosion protection of industrial goods, especially known worldwide for the production of passenger cars. In contrast to the application of most other paints the workpiece is dipped into a colloidal solution of the waterborne paint. A strong electric current, followed by water electrolysis, causes a pH-shift at...Ion-selective electrodes – classical systems and new ideas