Mixed thioalkyl-azoimine (SNN′)/α-diimine–ruthenium complexes: synthesis,characterization, DFT calculations,crystal structure and application as pre-catalysts for hydrogenation of acetophenone

Transition Metal Chemistry - Eight ruthenium complexes having thioalkyl-azoimine (SNN) ligands of two general types have been synthesized: (a) [Ru(L)(bipy)Cl](PF6) where {bipy = bipyridine,...     

Identification and quantification of diethylene glycol contamination in glycerine raw material

Fourier-transform infrared spectroscopy (FTIR) was successfully used for quantitative determination of diethylene glycol in glycerin raw material. In addition to the pure samples of both diethylene glycol and glycerin, nine binary mixtures of the two components with mixing ratios ranging from (70 to 98)%wt were created and studied as a training set. Glycerine showed, thereby, characteristic infrared bands at 1110, 992, 974, and 922?cm^?1 while those of diethylene glycol appear at 1085, 887, and 881?cm^?1. The quantitative determination of diethylene glycol in binary mixtures with glycerin was achieved upon using the absorbance difference between the 992?cm^?1 and the 881?cm^?1 as well as between 1110 and 1085?cm^?1 bands. With an average %error of 0.60 and 1.74, respectively and a limit of detection down to 0.85%, the created calibration curves from the training set were applied successfully to determine the composition of another eight binary mixtures of the two materials representing a validation set. The method was also applied to aqueous solutions of diethylene glycol and glycerin that contains (25 and 50)%wt water. Once more, training and validation sets of mixtures with different diethylene glycol and glycerin ratios at the two water percentages were prepared and measured. Again, successful determination of diethylene glycol in these aqueous solutions was achieved with an average %error of 0.92 and 0.47, respectively.     

A normoxic acrylic acid polymer gel for dosimetery in radiation therapy

Journal of Radioanalytical and Nuclear Chemistry - A novel low toxic normoxic polymer gel dosimeter containing acrylic acid monomer is prepared and characterized for dosimetry in radiotherapy. Gel...     

Novel polymer gel dosimeters based on N-Vinylcaprolactam for medical dosimetry

Journal of Radioanalytical and Nuclear Chemistry - A New polymer gel dosimeter containing N-Vinylcaprolactam monomer was prepared for radiotherapy. A medical linear accelerator was used to...     

The Crystal Structures of Bis(2-amino-5-methylpyridinium) Tetrabromometallate(II): Intermolecular Interactions in (C<Subscript>6</Subscript>H<Subscript>9</Subscript>N<Subscript>2</Subscript>)<Subscript>2</Subscript>[MBr<Subscript>4</Subscript>]; M = Cd and Co

Abstract The crystallization and structures of a triclinic (henceforth T) (C₆H₉N₂)₂[CdBr₄] and a monoclinic (henceforth M) of (C₆H₉N₂)₂[CoBr₄] are reported. The crystal packing of both solids is analyzed and compared: both contain parallel chains of cations and stacks of anions. In both T and M, each [MBr₄]²⁻ is hydrogen bonded non-symmetrically to surrounding cations in a ladder chains that run along b axis, with planar cations in both structures falling in parallel to the planes to anions. In T the cation chains are further involved in classical π···π stacking, while in M the cation chains show less significant stacking, with longer repeat distance. Index Abstract Extensive N–H···Br hydrogen bonds link both anions and cations into chains of the ladder type parallel to the crystallographic b axis. The crystal structures of bis(2-amino-5-methylpyridinium) tetrabromometallate(II): Intermolecular interactions in (C6H9N2)2[MBr4]; M = Cd and Co Rawhi Al-Far and Basem Fares Ali      

A kinetic study of the liquid-phase hydrogenation of phenylpropanal over alumina-supported Ir catalysts

Hydrogenation of phenylpropanal over Ir was investigated under mild conditions. An LH-kinetic model is presented that describes successfully experimental results specially the negative effects of temperature and initial concentrations.     

Use of Attenuated Total Reflection Fourier Transform Infrared Spectroscopy and Principal Component Analysis for the Assessment of Engine Oils

Journal of Applied Spectroscopy - Attenuated total reflection Fourier transform infrared spectroscopy coupled with principal component analysis was used to investigate expensive and low-priced...