The present study was designed to prepare the road base material by using electrolytic manganese residue (EMR), red mud (RM) and carbide slag (CS) as main raw materials. The mix was optimized and mechanical properties, durability, strength formation mechanism and environmental behavior were inve...

Europium complexes featuring fluorinated β-diketonate ligands [thenoyltrifluoroacetone (tta), 4,4,4-trifluoro-1-phenyl-1,3-butanedione (btfac), and 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate (hfac)] and nitrogen p,p′-disubstituted bipyridine and phenanthroline ligands [4,4′-dimethoxy-2,2′-bip...

Unstable transition metal compounds formed from hydridosilacyclobutanes are described: 1-methyl-1-silacyclobutane reacts with nonacarbonyldiiron to give the complexes [Fe(CO)4(H){Si(Me)CH2CH2CH2}] and [Fe{CH2CH2CH2Si(H)Me}(CO)4], and with bis(triphenylphosphine)(ethylene)platinum(0) to give [Pt(...

The electrochemical oxidation of the Cu(II) and Co(II) complexes with a series of substituted N,N′- ethylenebis(p-R-benzoylacetoneimines) [H2N2O2- (øR)2], where R = OCH3, CH3, H, F, Cl, Br and NO2, was investigated by cyclic voltammetry in acetonitrile at a platinum electrode. The anodic peak p...

Sulfurization of β-dithiolactone (4) gave corresponding 1,2-dithiolane-3-thione (2a) via an ionic intermediate. Oxidation of β-dithiolactone 4 by m-CPBA afforded corresponding S-oxide (11), while dioxide (12) was obtained when 3 equiv of m-CPBA was used. Dithiolane-3-thione 2a reacted with eth...

Polyvinyl alcohol (PVA) films doped with various concentration (1, 2, 4, 6 wt %) of Methylsilicon (IV) phthalocyanine hydroxide (MeSiPc) were achieved by casting procedure. FTIR results confirmed the increase of disordered ratio within the backbone structure of PVA as the dopant MeSiPc increases...

Reaction of tris(trimethylsilyl)cyclopentadienyllithium with zirconium and hafnium tetrachloride affords 1,1′,2,2′,4,4′-hexakis(trimethylsilyl)zirconocene dichloride and 1,1′,2,2′,4,4′-hexakis(trimethyl-silyl)hafnocene dichloride. These complexes show hindered rotation of the cyclopentadie...

The reactions of dichlorobis(cyclopentadienyl)hafnium(IV) with 3-indoleacetic acid (IAH), 3-indole propionic acid (IPH), 3-indolebutyric acid (IBH) and 1-tryptophan (TRH) in various stoichiometric ratios have been studied, and the complexes of the type C2Hf(L)Cl and CpHf(L)2Cl(where L is the bid...

Twelve unbridged metallocene dichloride complexes of the types [1-(4-XC6H4SiMe2)-η5-Ind]2MCl2 and [2-(4-XC6H4SiMe2)-η5-Ind]2MCl2 (X = Me, MeO, F; M = Zr, Hf) with differently 1- and 2-substituted indenyl ligands have been synthesized, characterized and applied for catalytic ethylene polymeriza...

A mechanism for the polymerization of ethylene and 1-hexene with Cp2HfCl2 was proposed and its kinetic parameters were estimated to quantify ethylene uptake curves and the structure of the polymer made with Cp2HfCl2 when hydrogen concentration, 1-hexene concentration and temperature varied in a ...

The decomposition of (η6-benzene)tricarbonylchromium(0) (BTC) and (η6-anisole)tricarbonylchromium(0) (ATC) supported on NaX zeolite has been studied by diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and temperature-programmed decomposition (TPDE). TPDE shows that CO gas i...

A general method for the preparation of 1,1′-bis(N,N-dimethylamino)metallocenes is described, involving the reaction of N,N-dimethylamino-cyclopentadienyllithium (1-Li) with metal chlorides. 1,1′-Bis(N,N-dimethylamino)ferrocene (2), 1,1′-bis(N,N-dimethylamino)cobaltocenium hexafluorophosphate...

The anion of 2-ethynyl-1-methylpyridinium salts, which polymerized rapidly, can be represented as the mesomeric betaine 1-methylpyridinium-2-acetylide or as the cumulene-type structure 1-methylpyridin-2-allenylidene. Palladium complexes have been prepared starting from 2-ethynylpyridine and Pd(P...

The kinetics of the reactions between trimethyloxonium hexafluorophosphate and a series of tetra-n-butylammonium arenesulfonates have been studied in acetonitrile at −23.4°. With the oxonium salt concentration at about 0.01 M, two series of runs were carried out; Hammett plots of the second-ord...

Chromium carbides, tungsten carbide and chromium oxide have been tested and evaluated as coatings to protect high temperature gas-cooled reactor (HTGR) steam generator and other HTGR components from adhesion, galling associated with sliding wear or from fretting. Tests were performed in commerci...

The present investigation has been carried out with the aim of determining the tribological behavior of a VPS chromium carbide coating both in the as-deposited and heat-treated conditions. A commercial powder of Cr2C3–25% NiCr was sprayed employing a VPS system (Medicoat AG, Switzerland) onto p...

This work studied the kinetics of copper-catalyzed decomposition of tetraphenylborate, triphenylborane, diphenylborinic acid and phenylboronic acid (NaTPB, 3PB, 2PB and 1PB, respectively) in aqueous alkaline solution over the temperature range of 25 to 70°C. The statistically designed test matr...

Dichlorobis(indenyl)-titanium(IV) and -zirconium(IV), (C9H7)2TiCl2 and (C9H7)2ZrCl2, react with bidentate Schiff bases such as salicylidene aniline, salicylidene-o-toluidine, salicylidene-m-toluidine and salicylidene-p-toluidine in a 1:1 molar ratio in refluxing tetrahydrofuran in the presence o...

The controlled gas-phase loading of a metal–organic framework (MOF) to generate iridium nanoparticles is described. The key is the use of an Ir complex, which was small enough to fit through the pore apertures of the MOF, stable enough to be vaporized and labile enough to be reduced inside the ...

New binuclear iridium(I) complexes with general formula [Ir2(η4-cod)2(μ-SB)] (1–12) derived from the reactions of tetradentate Schiff bases ligands [N,N′-ethylenebis(5-R-salicylideneimine)] (5,5′-R-salenH2), [N,N′-1,3-propylenebis(5-R-salicylideneimine)] (5,5′-R-salpenH2), and [N,N′-o-ph...