Alumina was doped with lanthana, La2O3, by either impregnation or co-precipitation. The doped and undoped alumina was then used as supports for the preparation of cobalt catalysts by incipient wetness impregnation. The catalysts prepared were characterized by nitrogen adsorption–desorption, pow...

Treatment of dimethyl maleate with DCo(CO)4 gives deuterated dimethyl fumarate and dimethyl succinate but no deuterium incorporation in the recovered maleate. The hydrogenation of dimethyl maleate to succinate proceeds via the fumarate. For the isomerization reaction, the results are best ration...

Extended Hückel Theory calculations have been carried out in a study of the most important cobalt carbonyls and hydrocarbonyls involved in the hydroformylation reaction. The geometries of the stable isomers of Co2(CO)8, Co2(CO)7, Co(CO)4, Co(CO)3 have been calculated and used to interpret the c...

The HCo(CO)4-catalyzed isomerization of PhCD2CHCH2 carried out in the presence of an excess of p-allyltoluene gave principally trans-PhCDCHCH3. This result rules out a catalyzed [1,3] sigmatropic shift but is consistent with a 1,2-addition-elimination mechanism.

Mixtures of vapours of trimethylamine alane and trimethylgallium have been studied using Fourier transform infrared spectroscopy and infrared laser powered homogeneous pyrolysis. The spectroscopic results confirm the existence of rapid exchange reactions, resulting in an accumulation of methyl g...

Mixtures of trimethylamine alane and triethylgallium in the gas phase have been shown by Fourier transform infrared spectroscopy to undergo rapid alkyl/hydride exchange reactions. During infrared laser powered homogeneous pyrolysis, β-elimination is favoured over metal-hydrogen bond homolysis a...

The structure of AlH3·2NMe3 has been investigated by single-crystal X-ray diffraction over the range of 296–173 K. Over this temperature range a phase change is observed from Cmca to Pbcm where the methyl groups convert from a statistically disordered conformation to adopt a mutually eclipsed ...

In the present study, a series of substituted 1,3,4-thiadiazole derivatives 4(a–o), 5(a–m) and 6(a–j) were synthesized and characterized by IR, 1H NMR, 13C NMR and mass spectroscopic technique. The synthesized compounds were evaluated for their in vitro anti-mycobacterial activity against the...

Vinyl carbamate (VC) is derived from ethyl carbamate (EC), a chemical found in alcoholic beverages and fermented foods. The objectives of this study were to characterize the formation of lung tumors induced by VC in F1 (Big Blue® x A/J) mice, and to identify the mutations formed in the Kras2 gen...

The first synthesis of sulfone-pyronin and sulfone-rosamine dyes bearing optically tunable primary amino groups (acting as fluorogenic centers) is presented. Sulfone analogs of xanthene-based fluorophores have recently been highlighted as a new class of near-infrared (NIR) fluorescent dyes (Liu ...

The formation constants of the first two species formed by some dipositive transition metal cations with the 1-hydroxycyclopentanecarboxylate (HCPC) ligand have been determined. K1 and K2, the first and second successive stability constants for the systems investigated, are respectively: Cu, 630...

We report herein the preparation, the electrochemical, the absorption and the emission properties of new heteroleptic bisterpyridine ruthenium complexes composed of a terpyridine functionalized on the 4′ position by a thienyl phosphonic acid. The complexes were tested in TiO2 dye-sensitized sol...

The direct arylation of either antipodes of 2,3,5-tri-O-benzyl arabinofuranose (D-2 and L-2) at the anomeric sites by means of bromomaegnesium salts of activated phenols (1a-d) in 1,2-dichloroethane furnishes β-D- and α-L-arabinofuranosylphenols (D-3 and L-3) with very high margin of regio- an...

Nicotine replacement therapy in the form of transdermal nicotine patches and nicotine gums combined with behavioral counseling still has a low smoking cessation rate of 25%. A promising approach to smoking cessation is to remotely program variable transdermal nicotine delivery rates, with inputs...

The ability to reliably produce one-dimensional ladder-like coordination polymers that display different crystal packing has been realized. These ladder polymers are produced by incorporating 4,4′-azopyridine (4,4-Azo) molecules as the bridging ligand that act as the stiles or rods for the ladd...

The reactions between a tri-cyanoethyl functionalized 17-membered macrocyclic compound (L) with five Ag(I) salts (hexafluoroantimonate, trifluoromethanesulfonate, 4-toluenesulfonate, heptafluorobutyrate and nitrate) led to the formation of [AgL](SbF6) (1), [AgL](SO3CF3) (2), [AgL](O2C4F7) (3), [...

2-Aminopyridinium p-Toluenesulfonate (2APPTS), an organic NLO crystal, was grown for the first time by the slow evaporation solution technique. Single crystal X-ray diffraction analysis reveals that 2APPTS belongs to monoclinic crystal system with centrosymmetric space group P21/n. The determine...

Good quality single crystals of 4-Dimethylaminopyridinium p-Toluenesulfonate (4DMAPPTS) possessing third order nonlinearity were grown by slow evaporation solution technique (SEST). Single crystal X-ray diffraction analysis reveals that 4DMAPPTS belongs to monoclinic crystal system with centrosy...

Water-soluble lignin derivatives – technical lignosulfonates (LS) – were used as reducing and stabilizing agents for a simple synthesis of silver nanoparticles (LS-AgNPs) in aqueous solution at room temperature during the reaction with silver salt. Three salts were used as the metal precursor:...

Ammonium p-toluenesulfonate single crystals (AMPTS) were grown by a slow cooling solution growth technique. The unit cell parameters and morphology of AMPTS crystal were found out by single crystal X-ray diffraction study. High-resolution X-ray diffraction study revealed the crystalline perfecti...