It is well established that the chain dimensions of a polymer are intimately related to viscoelastic fingerprint and relevant macroscopic properties material such as entanglement modulus its melt viscosity. In this work, have been obtained by means molecular dynamics simulations computed at different temperatures in series ethylene/1-butene copolymers with constant number carbons backbone but v...

Photoionization mass spectrometry of isotopically substituted 2-phenoxypropane (iPrOPh), 2-phenoxybutane (sBuOPh), and 3-phenoxypentane (3AmOPh) permits the analysis of branching ratios for competing pathways by which the radical cations expel neutral alkene to yield ionized phenol. Ionization energies (IEs) of 2-phenoxyalkanes do not differ significantly between 2-phenoxypropane and 2-phenoxyo...

The coordinatively unsaturated copper (II) complexes of 1,3-bis(2'-pyridyl)-1,2-diaza-2- butene with different ancillary anions were synthesized which can bind to copper centers of tyrosinase enzyme. The compounds were found to exhibit inhibitory activities against mushroom tyrosinase and the nature and extent of inhibition is modulated according to the type of ancillary anions.

Through the use of the technique of time-of-flight mass spectroscopy, we obtain strong-field ionization yields for randomly oriented 1,2-dichloroethylene (1,2-DCE) (C2H2Cl2) and 2-butene (C4H8). We are interested in studying the effect of conformal structure in strong-field ionization and, in particular, the role of molecular polarity. That is, we can perform strong-field ionization studies in ...

Synthesis of 4-(N,N- dimethylamino)-3-aryl-3-butene-2-one, ethyl-5-aryl-4-oxo-4H-pyran-2-carboxylate, ethyl-5-aryl-4-pyridones-2-carboxylate and 5-aryl-3-cyano-5-methyl-2-pyridones (aryl=3-thienyl, 2-furyl) are described.

We investigate the effect of crystalline structure iron oxide catalysts on oxidative dehydrogenation (ODH) n-butene. ODH reactions n-butene were carried out with a fixed-bed flow reactor at 450 °C under but-1-ene (1-C4H8) or cis-but-2-ene (cis-2-C4H8)(mL/min)/O2(mL/min) ratio 5/2.5. Of various oxide-based (α-, β-, γ-, ε-Fe2O3, Fe3O4, ZnFe2O4), ε-Fe2O3 showed highest activity. To best our knowle...