The title compound, [Ru(2)(C(22)H(34)Si(2))(CO)(4)], contains two Ru(I) atoms linked by a bridging (η(5)-(t)BuC(5)H(2))(2)(SiMe(2))(2) ligand ((t)Bu is a tert-butyl and Me is a methyl group) with an Ru-Ru bond length of 2.8401 (7) Å. The dihedral angle between the planes of the cyclo-penta-dienyl rings of the ligand is 123.13 (19)°. The four terminal carbonyl ligands are bound in a symmetrical ...

Titanosilicates (Ti-SiO2) are well-known catalysts for the epoxidation of olefins. Isolated Ti inserted in silica framework tetrahedral coordination active species. Recently, adjusting hydrophobic/hydrophilic balance such catalysts’ surfaces has appeared as a promising tool to further boost their performance. However, via one-pot classical sol-gel generally leads decrease dispersion and/or coll...

Recently, pervaporation separation processes have gained much attention in the separation of azeotropic and close boiling point organic-organic mixtures due to its high separation efficiency, economy, safety, and energy saving potentials. In this work, the effects of experimental factors such as feed composition and operating temperature on the performance of a commercial poly vinyl alcohol mem...

The widespread use of methyl tert-butyl ether (MTBE) as a gasoline additive has resulted in a large number of cases of groundwater contamination. Bioremediation is often proposed as the most promising alternative after treatment. However, MTBE biodegradation appears to be quite different from the biodegradation of usual gasoline contaminants such as benzene, toluene, ethyl benzene and xylene (B...

Methyl tert-butyl ether (MTBE) has been used in many countries as an octaneenhancing replacement for lead, primarily in midand high-grade gasoline. The prevalent use of MTBE has led to its introduction into environment. MTBE is poorly adsorbed, biologically and chemically stable, making it very persistent in the environment. MTBE has been classified as a possible human carcinogen. Many studies ...

Four new organotin(IV) complexes of bis-(2,6-di-tert-butylphenol)tin(IV) dichloride [(tert-Bu-)(2)(HO-Ph)](2)SnCl(2) (1) with the heterocyclic thioamides 2-mercapto-pyrimidine (PMTH), 2-mercapto-4-methyl-pyrimidine (MPMTH), 2-mercapto-pyridine (PYTH) and 2-mercapto-benzothiazole (MBZTH), of formulae {[(tert-Bu-)(2)(HO-Ph)](2)Sn(PMT)(2)} (2), {[(tert-Bu-)(2)(HO-Ph)](2)Sn(MPMT)(2)} (3), {[(tert-B...

Many chemically synthesized xenobiotics can significantly inhibit the vitality of parasitic nematodes. However, there is yet too little research on toxicity such contaminating compounds toward Compounds that are present in plants able to organisms as well. According results our laboratory studies toxicity, following caused no decrease larvae Strongyloides papillosus and Haemonchus contortus: me...

The title compound, C(13)H(23)N(3)O(4), was prepared starting from ethyl N-benzyl-3-oxopiperidine-4-carboxyl-ate through a nine-step reaction, including hydrogenation, Boc (tert-butoxy-carbon-yl) protection, methyl-ation, oximation, hydrolysis, esterification and ammonolysis. In the crystal structure, mol-ecules are linked by inter-molecular N-H⋯O hydrogen bonds to form a porous three-dimension...

Two routes to the 2,6-dideoxysugar methyl trioxacarcinoside A are described. Each was enabled by an apparent α-chelation-controlled addition of an allylmetal reagent to a ketone substrate containing a free α-hydroxyl group and a β-hydroxyl substituent, either free or protected as the corresponding di-tert-butylmethyl silyl ether. Both routes provide practical access to gram quantities of trioxa...