Urocanic acid (UA), existing in trans- or cis-isoform, is of fairly recent interest to food researchers because of its potential public health hazards of scombrotoxicity and immunotoxicity, as well as associating with fish spoilage. This work is among the first efforts to study the analytical ch...

Solutions of sodium perborate (SPB) in glacial acetic acid yield peracetic acid on aging and the peracetic acid oxidation of anilines to azobenzenes is very fast. SPB on dissolution in ethylene glycol affords hydrogen peroxide along with a borate; the oxidation in ethylene glycol–acetic acid is...

The standard (po =  0.1 MPa) molar enthalpies of combustion in oxygen, at T =  298.15 K, for crystalline 2-iodosobenzoic acid, (OI)C6H4COOH, and 4-nitrosophenol, (ON)C6H4OH, were measured by rotating-bomb calorimetry and static-bomb calorimetry, respectively. These values were used to derive the...

5-amino-1-pentanol (5-AP) undergoes facile intramolecular cyclocondensation to piperidine and to methyl or ethyl piperidines in the presence of methanol or ethanol over zeolite catalysts like ZSM-5 (Si/Al = 30, 129, 280), HM and HY. 2-Aminopyran (2-AP) is also observed as a major product in the ...

The synergistic effect of ozone on both, the TiO2-mediated photocatalytic and γ-rays induced degradation of 1×10−3 mol dm−3 4-chlorobenzaldehyde (4-ClBzAl) was studied as a function of absorbed energy. The formation of formaldehyde (HCHO), H+ and Cl− ions as well as of carboxylic acid was used...

Due to its proximity of Hg(II) atoms, electron-withdrawing properties and inherent accessibility to electrophilic sites on the molecular surface, trimeric perfluoro-ortho-phenylenemercury, (o-C6F4Hg)3, has demonstrated a capacity to form supramolecular adducts with a variety of neutral and anion...

The organic crystal 4-chlorobenzaldehyde-N-methyl 4-stilbazolium tosylate (CMST) was grown from acetonitrile and methanol mixed solvent using slow cooling method for the first time. The optimum growth conditions based on different solution concentrations were investigated. The crystal atomic pac...

Selective oxidation of p-xylene by emulsion electrolysis yields p-tolualdehyde. The reaction was carried out with platinum electrodes at 35–40 °C in an undivided cell with an emulsion consists of chloroform containing substrate and an aqueous solution of 2% sodium nitrate as a mediator with a ...

Absorption cross-sections for benzaldehyde, o-tolualdehyde, m-tolualdehyde and p-tolualdehyde have been measured in the wavelength region 252–368 nm using two different systems (D2 lamp-diode array and D2 lamp-monochromator). In addition, cross sections at 253.7, 312.2 and 365 nm have been meas...

The rotational spectrum of para-tolualdehyde (CH3-C6H4-CHO) has been measured using three different microwave spectrometers, with the goal of quantifying the influence of the aldehyde group at the top of the benzene ring on the internal rotation barrier seen by the methyl group at the bottom of ...

A high performance liquid chromatography-tandem mass spectrometry (HPLC–MS/MS) method was developed for simultaneous quantitative analysis of hydrazine and acetylhydrazine in human plasma based on the strategy of p-tolualdehyde derivatization. The derivatization reactions were easily realized b...

A new compound, 4-chlorobenzylammonium nitrate, was obtained by a reaction between 4-chlorobenzylamine and nitric acid, and characterized by X-ray diffraction and FT-IR spectroscopy. The phenyl ring and the nitro group were essentially coplanar in the obtained crystal. The aminomethyl substituen...

Chemical preparation, crystal structure, Hirshfeld surface analysis, IR absorption, NMR studies and DFT calculations are given for two new organic salts (ClC7H6NH3)·NO3 (I) and (ClC7H6NH3)·ClO4 (II). X-ray single crystal structural analysis shows that compound (I) crystallizes in a centrosymme...

This work deals with the vibrational spectroscopy of 2-amino-4-methyl benzonitrile (AMB) by means of quantum chemical calculations. The mid and far FTIR and FT-Raman spectra were measured in the condensed state. Hartree–Fock (HF/6-31G∗) and density functional theory (DFT, B3LYP/6-31G∗) ab initi...

Experimental data on the temperature dependence of the spin—lattice and spin—spin relaxation times of 35Cl nuclei in 4-chlorobenzyl chloride are interpreted by assuming that at a critical temperature, the relaxation mechanisms become more effective. This feature is related to the occurrence of...

The liquid-phase chlorination of benzyl chloride (BC) has been investigated in the presence of a series of zeolite catalysts at 353 K under atmospheric pressure. A comparative study reveals that of these catalysts zeolite H(26.1) K–L exhibits the highest rate of BC conversion (98.4 mmol g−1 h−1...

Diasteroeselective synthesis of (αR, 6R or 6S)-N-(α-methylbenzyl)-6-difluoromethyl-4-hydroxy-4-(4-chlorophenyl)piperidines, which were produced from the reaction of R, 6R)- or (αR, 6S)-N-(α-methylbenzyl)-6-difluoromethyl-4-piperidone and 4-chlorophenyllithium, is described.

4-Methoxy-α-methylbenzyl alcohol was introduced as a new protecting group for carboxylic acids. 4-Methoxy-α-methyl benzyl esters obtained from the coupling of 4-methoxy-α-methylbenzyl alcohol and corresponding acids, were hydrolyzed in good yield by 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ)....

The N-heterocyclic carbene silver(I) complex 1,3-bis(4-methylbenzyl)imidazol-2-ylidene silver chloride was applied as the effective catalyst for the three-component carboxylative coupling of terminal alkynes, butyl iodide and carbon dioxide. The reaction proved to be highly efficient when using ...

The thermal decomposition p-xylene (+ Ar)→4-methylbenzyl +H (+ Ar) (1) was studied in shockwaves between 1000 and 1800 K by monitoring UV absorptions of p-xylene and 4-methylbenzyl. A high-pressure limiting rate constant of k1 = 1015.7 exp(−355 kJ mol−1/RT) s−1 was derived. The experiments also...