scholarly journals 5. On the Oxidation of Phenyl Alcohol, and a Mechanical Arrangement adapted to illustrate Structure in the Nonsaturated Hydrocarbons

1869 ◽  
Vol 6 ◽  
pp. 82-86 ◽  
Author(s):  
J. Dewar
Keyword(s):  
Organic Compounds ◽  
Systematic Study ◽  
Aromatic Compounds ◽  
Oxidation Products ◽  
Oxidation Method ◽  
Closed Chain ◽  
Special Cases ◽  
Derivatives Of ◽  
Mechanical Arrangement ◽  
The Way

The syntheses and oxidation analyses of organic compounds have so confirmed each other in many cases, that chemists are enabled to judge of the structure of a compound from the oxidation products. Many chemists have used the oxidation method in special cases, the bodies operated upon belonging principally to the fatty series; but until Fittig and Beilstein published their memoirs on the aromatic compounds, it was never applied to the systematic study of a hydrocarbon and its derivatives. But although the syntheses and oxidation analyses of the derivatives of benzol confirmed each other, still the structure of the original nucleus (benzol) remained unexplained. Kekulê's original and elegant speculations on the structure of benzol and its derivatives induced me to try the effect of oxidising agents on benzol, with the view of eliciting whether the carbon atoms would separate in the way theory pointed out. The carbon atoms in benzol may be supposed to be arranged in a closed chain, where the carbon affinities are bound two and one alternately.

Hydrogen bonding in organic compounds. IX. Intramolecular actions between the primary amine group and amino, nitro, sulphide, and sulphone groups in aromatic compounds

1964 ◽  
Vol 17 (8) ◽  
pp. 860 ◽  
Author(s):  
AN Hambly ◽  
BV O'Grady
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Organic Compounds ◽  
Aromatic Compounds ◽  
Amine Group ◽  
Intermolecular Hydrogen Bonds ◽  
Amino Derivatives ◽  
Stretching Vibrations ◽  
Intramolecular Hydrogen ◽  
Derivatives Of

Spectroscopic evidence for the existence of intermolecular hydrogen bonds between aniline molecules has been obtained. Examples show the existence of intramolecular hydrogen bonds in orthodiamines, some amino-derivatives of heterocycles, 2-nitro-amines, 2-amino-sulphones, and 2-amino-sulphides. Some new observations, which do not agree with Krueger's interpretation of the profile of the overtone bands due to NH2 stretching vibrations, are recorded.

scholarly journals Rate of Convergence for Ibragimov-Gadjiev-Durrmeyer Operators

2017 ◽  
Vol 50 (1) ◽  
pp. 119-129 ◽  
Author(s):  
Tuncer Acar
Keyword(s):  
Rate Of Convergence ◽  
Bounded Variation ◽  
General Class ◽  
Durrmeyer Operators ◽  
Special Cases ◽  
Derivatives Of

Abstract The present paper deals with the rate of convergence of the general class of Durrmeyer operators, which are generalization of Ibragimov-Gadjiev operators. The special cases of the operators include somewell known operators as particular cases viz. Szász-Mirakyan-Durrmeyer operators, Baskakov-Durrmeyer operators. Herewe estimate the rate of convergence of Ibragimov-Gadjiev-Durrmeyer operators for functions having derivatives of bounded variation.

scholarly journals New Derivatives of Tylosin: Chemical and Electrochemical Oxidation Products of Desmycosin.

2002 ◽  
Vol 55 (9) ◽  
pp. 807-813 ◽  
Author(s):  
Z. MANDIC ◽  
A. NARANDA ◽  
P. NOVAK ◽  
K. BRAJŠA ◽  
M. DEREK ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Oxidation Products ◽  
Derivatives Of

scholarly journals Elemental composition and clustering behaviour of α-pinene oxidation products for different oxidation conditions

2015 ◽  
Vol 15 (8) ◽  
pp. 4145-4159 ◽  
Author(s):  
A. P. Praplan ◽  
S. Schobesberger ◽  
F. Bianchi ◽  
M. P. Rissanen ◽  
M. Ehn ◽  
...  
Keyword(s):  
Elemental Composition ◽  
Organic Compounds ◽  
Atmospheric Pressure ◽  
Molar Mass ◽  
Oxidation Products ◽  
Neutral Species ◽  
Mass Spectrometers ◽  
Comprehensive Picture ◽  
The Difference ◽  
Chemical Ionisation

Abstract. This study presents the difference between oxidised organic compounds formed by α-pinene oxidation under various conditions in the CLOUD environmental chamber: (1) pure ozonolysis (in the presence of hydrogen as hydroxyl radical (OH) scavenger) and (2) OH oxidation (initiated by nitrous acid (HONO) photolysis by ultraviolet light) in the absence of ozone. We discuss results from three Atmospheric Pressure interface Time-of-Flight (APi-TOF) mass spectrometers measuring simultaneously the composition of naturally charged as well as neutral species (via chemical ionisation with nitrate). Natural chemical ionisation takes place in the CLOUD chamber and organic oxidised compounds form clusters with nitrate, bisulfate, bisulfate/sulfuric acid clusters, ammonium, and dimethylaminium, or get protonated. The results from this study show that this process is selective for various oxidised organic compounds with low molar mass and ions, so that in order to obtain a comprehensive picture of the elemental composition of oxidation products and their clustering behaviour, several instruments must be used. We compare oxidation products containing 10 and 20 carbon atoms and show that highly oxidised organic compounds are formed in the early stages of the oxidation.

scholarly journals New Formulae for the High-Order Derivatives of Some Jacobi Polynomials: An Application to Some High-Order Boundary Value Problems

2014 ◽  
Vol 2014 ◽  
pp. 1-11
Author(s):  
W. M. Abd-Elhameed
Keyword(s):  
Galerkin Method ◽  
Boundary Value Problems ◽  
Chebyshev Polynomials ◽  
Hypergeometric Functions ◽  
Jacobi Polynomials ◽  
Boundary Value ◽  
High Order ◽  
Sixth Order ◽  
Special Cases ◽  
Derivatives Of

This paper is concerned with deriving some new formulae expressing explicitly the high-order derivatives of Jacobi polynomials whose parameters difference is one or two of any degree and of any order in terms of their corresponding Jacobi polynomials. The derivatives formulae for Chebyshev polynomials of third and fourth kinds of any degree and of any order in terms of their corresponding Chebyshev polynomials are deduced as special cases. Some new reduction formulae for summing some terminating hypergeometric functions of unit argument are also deduced. As an application, and with the aid of the new introduced derivatives formulae, an algorithm for solving special sixth-order boundary value problems are implemented with the aid of applying Galerkin method. A numerical example is presented hoping to ascertain the validity and the applicability of the proposed algorithms.

Direct synthesis of organic derivatives of silicon using nonhalogenated organic compounds

1970 ◽  
Vol 9 (5) ◽  
pp. 1071-1075 ◽  
Author(s):  
William E. Newton ◽  
Eugene G. Rochow
Keyword(s):  
Organic Compounds ◽  
Direct Synthesis ◽  
Derivatives Of

scholarly journals Removal of Organic Compounds with an Amino Group during the Nanofiltration Process

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 58
Author(s):  
Renata Żyłła ◽  
Magdalena Foszpańczyk ◽  
Magdalena Olak-Kucharczyk ◽  
Joanna Marszałek ◽  
Stanisław Ledakowicz
Keyword(s):  
Organic Compounds ◽  
Natural Organic Matter ◽  
Oxidation Product ◽  
Membrane Filtration ◽  
Separation Efficiency ◽  
Ph Value ◽  
Oxidation Products ◽  
Low Molecular Weight ◽  
Amino Group ◽  
Amino Groups

The research covered the process of nanofiltration of low molecular weight organic compounds in aqueous solution. The article presents the results of experiments on membrane filtration of compounds containing amino groups in the aromatic ring and comparing them with the results for compounds without amino groups. The research was carried out for several commercial polymer membranes: HL, TS40, TS80, DL from various manufacturers. It has been shown that the presence of the amino group and its position in relation to the carboxyl group in the molecule affects the retention in the nanofiltration process. The research also included the oxidation products of selected pharmaceuticals. It has been shown that 4-Amino-3,5-dichlorophenol—a oxidation product of diclofenac and 4-ethylbenzaldehyde—a oxidation product of IBU, show poor separation efficiency on the selected commercial membranes, regardless of the pH value and the presence of natural organic matter (NOM). It has been shown that pre-ozonation of natural river water can improve the retention of pollutants removed.

Sign in / Sign up

Export Citation Format

Share Document