To better understand the chemistry of the combustion of components of diesel fuel, the structure of a laminar lean premixed methane flame doped with indane has been investigated. The inlet gases contained 7.1% (molar) of methane, 36.8% of oxygen and 0.9% of indane corresponding to an equivalence...
Microwave heating is widely used to accelerate organic reactions and enhance the activity of enzymes. However, the detailed molecular mechanism for the effect of microwave on chemical reactions is not yet fully understood. To investigate the effects of microwave heating on organic compounds, we ...
The autoignition chemistry of lean n-propylcyclohexane/“air” mixtures (ϕ = 0.3, 0.4, 0.5) was investigated in a rapid compression machine at compressed gas temperatures ranging from 620 to 930 K and pressures ranging from 0.45 to 1.34 MPa. Cool flame and ignition delay times were measured. Coo...
For a better understanding of the chemistry involved during the combustion of components of diesel fuel, the structure of a laminar lean premixed methane flame doped with n-propylcyclohexane has been investigated. The inlet gases contained 7.1% (molar) methane, 36.8% oxygen, and 0.81% n-propylcy...
In the present investigation new experimental data on laminar flame speeds of n-decane, n-butylbenzene, and n-propylcyclohexane single- and multi-component mixtures are presented. The experiments have been conducted in a spherical bomb heated to 403 K and at an initial pressure of 1 bar. The com...
Temperature-programmed desorption spectra for exposure of PF3 on Ni(755) are characterized by two desorption features around 350 and 650 K. The lower temperature feature is assigned to the molecular desorption and the higher one to the recombinative desorption of PF3 fragments, respectively. The...
The urinary metabolites of ethylcyclohexane (ECH) in male Fischer 344 rats, administered the hydrocarbon by gavage, included 4-ethylcyclohexanol, 2-hydroxy-4-ethylcyclohexanone, 2c-hydroxy-4c-ethylcyclohexanol, 2c-hydroxy-4t-ethylcyclohexanol, 2t-hydroxy-4c-ethylcyclohexanol and 2t-hydroxy-4-t-e...
The reinvestigation of the aerial parts of Andriala integrifolia afforded three new lactones, a guaianolide, a guaianolide glucopyranoside and an ethylcyclohexane lactonic derivative with a quinol structure, together with five known compounds. Their structures were established by high field 1H N...
Ethylcyclohexane (ECH) is a model compound for cycloalkanes with long alkyl side-chains. A preliminary investigation on ECH (Wang et al., Proc. Combust. Inst., 35, 2015, 367–375) revealed that an accurate ECH kinetic model with detailed fuel consumption mechanism and aromatic growth pathways, a...
The behaviour of the acoustic attenuation in ethylcyclohexane at ultrasonic frequencies as a function of the temperature between 300 K and 100 K has been analyzed exploiting the information recently obtained by high resolution dielectric spectroscopy. The results suggest the existence of a secon...
To get a better understanding of the combustion chemistry of cycloalkanes with long side chain, the pyrolysis of ethylcyclohexane (ECH) was studied in a flow reactor at atmospheric pressure. The pyrolysis species were analyzed by two methods, synchrotron vacuum ultraviolet photoionization mass s...
To get a better understanding of low temperature oxidation chemistry of long-side-chain cycloalkanes, the low- and intermediate-temperature oxidation mechanisms and kinetics of ethylcyclohexane (ECH) have been investigated by using a combination of electronic-structure theory, transition state t...
To deeply reveal the impact of the substituents and their special orientations in ring on conformational behaviors for substituted cyclohexanes, a comprehensive study of ethylcyclohexane, cis-, and trans-1,2-dimethylcyclohexanes has been carried out. All conformational structures for them were c...
Ethyl esters of ten alicyclic β-aminocarboxylic acids were resolved by lipase catalysis in organic solvents. The resolution was based on acylation of the amino group at the R-stereogenic centre with various 2,2,2-trifluoroethyl esters. An increase in the hydrophobic nature of the acyl donor enh...
An asymmetric Diels–Alder reaction between the enantiopure (R)-benzyl-4-(3-acryloyloxy-4,4-dimethyl-2-oxopyrrolidin-1-yl)-benzoate (R)-2 and the N-Z-aminodiene 3 proceeded with total endo diastereoselectivity and was facially controlled in favour of the (3′R,1R,2S)-adduct. The two adducts obta...
The Curtius rearrangement of cyclohex-3-ene carboxylic acid using diphenylphosphoryl azide in the presence of triethylamime and ethanol, t-butanol or benzyl alcohol has been described. As a result the synthesis of ethyl, t-butyl or benzyl N-(1-cyclohex-3-enyl)carbamates has been achieved in one ...
Reversed-phase high-performance liquid chromatographic methods were developed for the separation and quantification of the enantiomers of alicyclic β-amino acids: racemic cis- and trans-2-aminocyclohexane-1-carboxylic acids (cis- and trans-ACHC) and racemic cis- and trans-2-animon-4-cyclohexene...
Enantiomerically pure (3R,4S) and (3S,4R) protected 4-amino-1-oxyl-2,2,6,6-tetramethylpiperidine-3-carboxylic acids were synthesized by reduction of the enamines resulting from the condensation of 3-carboxymethyl-1-oxyl-2,2,6,6-tetramethyl-4-piperidone with (R) or (S)-α-methylbenzylamine. While...
The dipole moment, linear polarizability and first hyperpolarizability of the 3-methyl-4-nitropyridine-1-oxyde (POM) molecules in solid phase were determined by applying iteratively a supermolecule approach in combination with an electrostatic embedding scheme, in which the surrounding molecules...
The X-ray crystal structure determination of 3-chloro-2,6-dimethyl-4-nitropyridine N-oxide (ClDMNPNO) and 3-bromo-2,6-dimethyl-4-nitropyridine N-oxide (BrDMNPNO) shows that the two pyridine derivatives are isomorphic with monoclinic space group P21/c, and four formula units in a cell with the fo...
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