A surfactant based oxodiperoxo molybdenum complex, which could activate molecular oxygen, has been employed as a catalyst for controlled oxidation of benzylic alcohols to corresponding carbonyls. The oxidation reactions were carried out under aqueous environment, however, in the absence of any e...

Multi-walled carbon nanotubes functionalised by di-t-butyl selenophosphoryl groups were used to remove Pb(II) ions from synthetic and real aqueous solutions. The effects of the initial Pb(II) ion concentrations, pH, and volume of the synthetic aqueous solution, adsorbent dosage, and temperature ...

Copolymers with various contents of 3-methacryloyloxystyryl-4′-methylphenyl ketone (MSMPK) and methyl methacrylate (MMA) were prepared in methyl ethyl ketone solution using benzoyl peroxide as a free radical initiator at 70 °C. Characterization of the resulting polymers was done by UV, FT-IR, ...

The status and nature of extraframework Al (EFAl) species in H-mordenite dealuminated by ammonium hexafluorosilicate (i.e., (NH4)2SiF6, AHFS) was investigated. Considerable difference arising from the experimental conditions of AHFS dealumination, that is, in the presence and absence of ammonium...

A high-rate copper electrodeposition performed from a hexafluorosilicate bath is presented in this article. It is shown that the current density for electrodeposition ranges from 1 to 30 A dm− 2 and the optimal suggested current density is 15 A dm− 2 or a rate of 200 μm h– 1. High plating rate...

The organic material 4-chloro-4′-chlorobenzylidene aniline (CCBA) was synthesized and confirmed by NMR and FTIR spectral analyses. CCBA crystal was grown from chloroform by slow evaporation at room temperature and the single crystal cell parameters were determined by single crystal X-ray diffra...

Single crystal of an organic material, 4-chloro-4′bromobenzylidene aniline (CBBA), was synthesized and grown by slow evaporation method at room temperature. 1H and 13C NMR spectra were recorded to elucidate the molecular structure and functional groups of CBBA were identified using FTIR and FT ...

A series of 16 N1-(3-chloro-4-fluorophenyl)-N4-substituted semicarbazone derivatives were synthesized and subjected to computational pharmacokinetic studies to predict molecular properties. All the title compounds (4a–p) followed the Lipinski “Rule of Five”. The synthesized compounds were cha...

Corrosion inhibition of carbon steel in hydrochloric acid solution was inspected using newly Benzylidene-aniline derivatives namely: (E)-N(2-Chlorobenzylidene)-2-Fluorobenzenamine (NCF) and (E)-N(2-Chlorobenzylidene)-3-Chloro-2-Methylbenzenamine (NCCM), by potentiodynamic polarization and electr...

From the general scheme of the transfer hydrogenation of α,β-unsaturated ketones by alcohols in the presence of catalytic amounts of RhH-(PPh3)4, kinetic equations have been established which account for the various reaction intermediates. The conditions for which these equations can accomodat...

1H NMR spectroscopy and isotope effects have been used to elucidate some new details in the mechanism of the transfer hydrogenation of α,β-unsaturated ketones by alcohols in the presence of catalytic amounts of RhH(PPh3)4.The isotopic labelling of the alcohols shows the regioselectivity of the...

The rhodium (I) catalysed tandem hydrosilylation-intramolecular aldol reaction provides a simple strategy for construction of a range of usefully functionalised five-membered rings from readily prepared 6-oxo-2-hexenoates in good yield and with good to excellent stereoselectivity. A series of si...

Addition of η3-oxaallyl bis(triphenylphosphine)rhodium(I) (1) or η3-allyl bis(triphenylphosphine)rhodium(I) (2) to a mixture of cyclopropyl phenyl ketone and triethylsilane promotes two competitive catalytic reactions. Complex 1 gives high yields of the silyl ether 13, while complex 2 favors a...

A kinetic examination of the influence of phenyldibenzophosphole (DBF) on the catalytic activity of hydridotetrakis(triphenylphosphine)-rhodium(I) (HRh(PPh3)4) and of hydridocarbonyltris(triphenylphosphine)-rhodium(I) (HRh(CO)(PPh3)3) has been undertaken. The rate of hex-1-ene hydrogenation is i...

A large variety of alcohols and α,β-unsaturated ketones has been used to demonstrate the scope and synthetic application of the transfer hydrogenation reaction with RhH(PPh3)4 as a catalyst. The reaction is shown to proceed under mild conditions with favorable kinetics. A hitherto unobserved i...

Kinetic study of the catalytic oxidation of cis- and trans-4-t-Bu-cyclohexanol by 2-cyclohexenone shows that the cis isomer is the more reactive. This result is attributed to the fact that the hydroxyl group in the axial position is more apt to form a bond with rhodium than is the equatorial one...

Homomolecular esterification of benzaldehyde has been carried out under mild conditions using RhH(PPh3)4 as catalyst. A kinetic study of the reaction has revealed a law rate of the form 4 = k [benzaldehyde]2[catalyst]. The rate-limiting step in the mechanism is the complexation of the second ald...

Hydridotetrakis(triphenylphosphine)rhodium(I) acts as an effective catalyst for the reactions of α,β-unsaturated carbonyl compounds with silanes to give regioselectively the enol silyl ethers in a 1,4-hydrosilation.

11B NMR spectra of tetraborane(8) carbonyl, B4H8·CO 1, reveal a changeover in the distribution of isomers in going from toluene solution to the gas phase. Fortuitously the distribution is 60:40 in each case, but comparison with published electron diffraction data and ab initio/IGLO computations...

The new compound, dimethylenetetraborane, C2H4B4H8, has been prepared in 70 per cent yields by the reaction of ethylene with tetraborane. Chemical and physical evidence indicate that it has a cyclic bridged structure which is unique in borane chemistry.