A series of novel half-titanocene complexes CpTiCl2[S-2-R-6-(PPh2)C6H3] (Cp = C5H5, 2a, R = H; 2b, R = Ph; 2c, R = SiMe3) have been synthesized by treating CpTiCl3 with the sodium of the ligands, 2-R-6-(PPh2)C6H3SNa, which were prepared by the corresponding ligands and NaH. These complexes have been characterized by H, C and P NMR as well as elemental analyses. Structures for 2a–b were further ...

Neutral (salicylaldiminato)nickel(II) methyl complexes [{6-C(H)dNAr-2,4-I2C6H2O-κN,O}NiMe(L)] (Ar ) 2,6-{3,5-(F3C)2C6H3}2C6H3) with different water-soluble ligands L (2a, L ) 1,3,5-triaza-7phosphaadamantane; 2b, L ) hexamethylenetetramine (urotropine); 2c, L ) tetraethylammonium pyridine3-sulfonate; 2d, L ) amino-terminated poly(ethylene glycol) monomethoxy ether) were prepared. 2a-d are potent...

In situ prepared chromium catalysts containing bulky diphosphinoamine (PNP) ligands, upon activation with MAO, are extremely efficient catalysts for the trimerisation of ethylene to 1-hexene.

The electrochemical CO2 reduction reaction (CO2RR) to yield high-value added fuels and chemicals provides a promising approach towards global carbon neutrality. Constant endeavors have been devoted the exploration of high-efficiency catalyst with rapid kinetics, low energy input, high selectivity. In addition maximum metal atomic utilization unique catalytic performance single-atom (SAC), dual-...

Rhodium-based catalysts are potential candidates to process biomass and serve as a representation of the class of noble metal catalysts for biomass-related processes. Biomass can be processed in aqueous media (hydrolysis and aqueous phase reforming), and in this case the surface chemistry involves hydroxyl (OH) species. In our study this was modelled by the presence of pre-adsorbed oxygen. Ethy...

Catalytic dehydrogenation of ethanol produces acetaldehyde, an important precursor for several value-added chemicals such as acetic acid and acetate esters. In this paper, we demonstrate that Zn-containing MFI zeolites are highly active selective catalysts process. Furthermore, show their activity selectivity depend on the chemical composition preparation catalysts. The best catalyst comprises ...

Functionalized polyethylene-based nanocomposites were prepared by in situ polymerization of ethylene with modified or neat MCM-41 nanoparticles (NMCM-41). Two different synthetic approaches investigated to improve the compatibility between hydrophobic HDPE matrix and hydrophilic NMCM-41: (i) incorporation UA into polymeric copolymerization ethylene, promoted zirconocene catalyst under homogeneo...

Magnesium alkyls such as butyl octyl magnesium and ethyl are used precursors for highly active water-free chloride support materials Ziegler–Natta catalysts. These show a high viscosity in hydrocarbon solvents which negatively affect their industrial application. Density functional theory (DFT) calculations supported the hypothesis that can form oligomeric chain structures responsible viscosity...

On the basis of X-ray diffraction and mass spectrometric analysis of carrier γ-Al2O3 and catalysts CuCl2/CuCl on its surface, the chemical structure of the active centers of two types oxidative chlorination catalysts applied and permeated type of industrial brands "Harshow" and "MEDС-B" was investigated. On the basis of quantum-mechanical theory of the crystal, field complexes were detected by ...