bluuebunny/crossref_metadata_2025_split huggingface dataset:
d‐NMR‐Untersuchungen der behinderten Rotation am NC(X)‐Bindungsfragment. XIV. 13C‐NMR‐Spektren von β‐Anilinovinyl‐phenyl‐thioketonen
Authors: Kleinpeter E. , Pulst M. , Pihlaja K. 
Published: December 2004

d‐N.M.R. Investigations of the Restricted Rotation at the NC(X) Bonding Fragment. XIV. 13C‐N.M.R.‐Spectra of β‐Anilinovinyl‐phenyl‐thioketonesN‐phenyl‐substituted β‐anilinovinyl‐phenyl‐thioketones (1, 2) are investigated for restricted rotations about partial double bonds and preferential conformers by 1H‐ and 13C‐n.m.r. spectroscopy. Substituent dependent 13C‐chemical shift variations and the strength control of the intramolecular hydrogen bridge are discussed.
Exo‐ and endohormones. V. Syntheses of the Sex Pheromone of the European pine shoot moth (rhyacionia buoliana). The Grignard route
Authors: Popovici N. , Botar A. A. , Barabás A. , Oprean I. , Hodosan F. 
Published: December 2004

Exo‐ and Endohormones. V. Synthesen des Sexualpheromons des Kiefernknospentriebwicklers (Rhyacionia buoliana) durch Grignard‐ReaktionenGrignard‐Kopplungen zwischen zwei entsprechenden Synthonen führen zum (E)‐9‐Dodecen‐1‐ylacetat (1), dem Sexuallockstoff des Kiefernknospentriebwicklers (Rhyacionioa buoliana). Als solche Synthon‐Paare wurden 1‐Brom‐(E)‐2‐penten (2) und 7‐Bromheptyltetrahydropyranylether (3) bzw. (E)‐3‐Hexen‐1‐yltosylat (4) und 6‐Bromhexyltrimethylsilylether (5) eingesetzt. Das Endprodukt (1) und die wichtigsten Zwischenprodukte wurden durch ihre 1H‐ und 13C‐NMR‐Spektren charakterisiert. Durch die zweite Synthese wurden 100% Regio‐ und 99% Stereoselektivität erreicht.
Zur Kinetik der Halcon‐Reaktion
Authors: Megdiche R. , Schnurpfeil D. 
Published: December 2004

The Kinetics of the Halcon ReactionWe have investigated the influence of all types of reaction products on the rate of the Halcon reaction. The experiments show that the retarding effect of epoxide is higher than that of the alcohol. Furthermore we have found that the consecutive products of the epoxide retard the Halcon reaction more than the primary reaction products. The reaction rate can be described by an equation of the Michaelis‐Menten‐type. We determined the initial reaction rate in dependence on the starting concentration on the reaction products.
Zur Nitrierung von Ethylenoxid
Authors: Slavtscheva Ju. , Minkov D. , Kolev N. 
Published: December 2004

About the Nitration of Ethylene OxideNitration of ethylene oxide with pure nitric acid of different concentrations as well as in presence of sulphuric acid was carried out.The products, ethyleneglycol dinitrate 1, diethylenglycol dinitrate 2, triethyleneglycol dinitrate 3, tetraethylenglycol dinitrate 4, ethyleneglycol mononitrate 5, diethyleneglycol mononitrate 6, and 2, 2′‐dinitratediethylsulphate 7 were structurally determined by i. r.‐ and 1H‐n. m. r.‐spectroscopy.
Zur Umsetzung von o‐Lithio‐lithiumphenolat und o‐Lithio‐N‐methyl‐lithiumanilid mit Halogeniden des Phosphors, Arsens und Siliziums
Authors: Heinicke J. , Tzschach A. 
Published: December 2004

Reactions of o‐Lithio‐lithiumphenolate and o‐Lithio‐N‐methyl‐lithiumanilide with Halides of Phosphorus, Arsenic and SiliconThe title compounds and chlorides of the type CIERn (E = P, As, Si) react smoothly in a molecular ratio of 1:2 to give the corresponding disubstituted phenole and N‐methylaniline derivatives, respectively. Attempts with an 1:1 ratio show different results depending on the reactivity of the EO or EN species towards organolithium reagents.
Theoretische Untersuchungen zum elektrophilen Angriff. IX. Intramolekulare H‐Verschiebungen in den protonierten orthodisubstituierten Aromaten o‐Xylen und 1, 2‐Difluorbenzen
Authors: Heidrich D. , Weiss C. , Illek B. 
Published: December 2004

Theoretical Studies on the Electrophilic Attack. IX. Intramolecular H‐Shifts in the ortho‐Disubstituted Aromatic Compounds o‐Xylene and 1, 2‐DifluorobenzeneA potential energy characterization of the proton shifts in the above cited 1, 2‐disubstituted aromatic compounds and their dependence on solvent influence are studied by means of theoretical methods. The results complete in many points our knowledge of experimental data in solution estimated from n. m. r. spectroscopic investigations.
Zum Einfluß stereochemisch bedingter Energieunterschiede auf die Ionisation und Fragmentierung von Tricyclo[5.2.1.02, 6] decanen, ‐decenen und ‐decadienen
Authors: Herzschuh R. , Kühn H. , Mühlstädt M. 
Published: December 2004

The Influence of the Strain Energies on the Ionization and the Fragmentation of Tricyclo [5.2.1.02, 6]decanes, ‐decenes and ‐decadienesThe mass spectra of the title compounds are discussed. The inverse relationship of the abundance of the molecular ions with the calculated strain energies has been found to occur in the stereoisomers. The main fragmentation of the alkenes is the Retro‐Diels‐Alder cleavage. The stereochemical effects influence also the ionization and appearance energy.
Hammett‐Beziehungen zwischen 1H‐NMR‐ bzw. 31P‐NMR‐chemischen Verschiebungen und Substituenten‐konstanten in ω‐Diphenylphosphinyl‐und ω‐Diphenylthiophosphinyl‐trans‐styrenen
Authors: Gloyna D. , Köppel H. , Schleinitz K.‐D. , Berndt K.‐G. , Radeglia R. 
Published: December 2004

Hammett Relationships between 1H‐NMR and 31P‐NMR Chemical Shifts, Respectively, and Substituent Constants in ω‐Diphenylphosphinyl and ω‐Diphenylthiophosphinyl trans‐StyrenesA well linear correlation between the chemical shifts of the ethylenic protons HB and the 31P nuclei, respectively, and the Hammett constants σp of substituents R in 4‐position for diphenylphosphinyl trans‐styrenes 1 and the analogous diphenylthiophosphinyl trans‐styrenes 2 has been found. A similar relationship for the proton HA has been observed in the case of 1 only, but the substituent‐induced shifts are not so sensitive. Donor substituents R in 1 and 2 effect an increase in the shielding of HB and a deshielding of the P atom being connected with shifts of the i. r. PO absorption bands in 1 in the direction of lower wavenumbers. A mesomeric interaction between R and PY substituents (Y = O, S) is concluded to produce polymethin‐like π‐electron density distribution.
Zur Pyrolyse von 1‐14C‐Pent‐1‐en
Authors: Kopinke F.‐D. , Bach G. , Ondruschka B. , Zimmermann G. 
Published: December 2004

On the Pyrolysis of 1‐14C‐Pent‐1‐eneIn the thermal decomposition of 1‐14C‐pent‐1‐ene at 550 to 650°C a mixture of saturated and olefinic hydrocarbons ⩽ C6 is formed. The reaction products were analyzed by gaschromatography, the distribution of radioactivity in the main products by radio gaschromatography.The results are discussed on the basis of a conventional radical reaction scheme including 1.4‐ and 1.5‐H‐shifts in intermediate alkyl and alkenyl radicals. The distribution of pyrolysis products and of their radioactivity allows a semiquantitative description of the complex decomposition of n‐pent‐1‐en.
Synthese und Reaktionsverhalten von 2‐Aryl‐3‐chlormaleinimiden
Authors: Augustin M. , Faust J. , Köhler M. 
Published: December 2004

Synthesis and Reaction Behaviour of 2‐Aryl‐3‐chloro‐maleimides2‐Aryl‐3‐chloro‐maleimides 2 are prepared by the chlorination of aryl‐maleicanhydrides and aminolysis of the resulting 1‐aryl‐2‐chloro‐maleicanhydrides 1. The imide 2a is reacted with N, S, O and Cnucleophiles and inorganic salts to give 2, 3‐disubstituted maleimides 3–6, 9, 10, 12, condensed heterocycles 7 and maleimide dimeres 8, 13, 14.
Elektrochemische Adamantylierung von Styrylpyridinen
Authors: Hess U. , Huhn D. 
Published: December 2004

Electrochemical Adamantylation of StyrylpyridinesThe reaction between electrochemically generated anion radicals of the 4‐(4‐styryl)‐pyridines 1–6 and 1‐bromoadamantane gives, in solvents of low proton availability as N, Ndimethylformamide via an electron transfer in solution and formation of 1‐adamantyl‐radicals, monoadamantylated pyrid‐4‐yl‐phenylethanes. The major product results from an anion radical/radicalcoupling in the 2(β)‐ next the 1(α)‐position. A competing pathway of the electrohydroadamantylation is the hydrogeneration of the CHCHdouble bond, whose importance increases with the water content of the solvent. Based on cyclic‐voltammetric evidence and product distribution, the mechanism of the reductive coupling of 1–6 in the presence of 1‐bromoadamantane in discussed in terms of indirect electrolysis.
Nucleophile Substitutionen in der 1, 3, 5‐Triazinreihe. VIII. Zur Hydrolyse des Cyanurchlorids in Dioxan‐Wasser
Authors: Bacaloglu R. , Havlik J. 
Published: December 2004

Nucleophilic Substitutions in the 1, 3, 5‐Triazines. VIII. The Hydrolysis of Cyanuric Chloride in Dioxane WaterThe kinetics of cyanuric chloride first step hydrolysis in dioxan‐water was conductometrically studied. At small water concentrations the slow stage of hydrolysis at 2,4‐dichloro‐6‐hydroxy‐1,3,5‐triazin consists in the nucleophilic attack ot water molecule to cyanuric cloride. At higher water concentrations the rate of this process exceeds that of the chlorine anion monomolecular elimination which becomes the slow step.
Die Bestimmung der Optischen Reinheit an Zwischenprodukten der Prostaglandinsynthese mit Hilfe der NMR‐Spektroskopie
Authors: Zepter Rudolf , Wentzke Manfred , Schwarz Sigfrid 
Published: December 2004

The Determination of Enantiomeric Purity of Intermediates for Prostaglandins by N. M. R. SpectroscopyIm Rahmen einer Prostaglandinsynthese waren chirale Ringschlüsselprodukte durch mikrobielle Transformation gewonnen worden [1]. Zur vollständigen Charakterisierung dieser Ringschlüssel‐produkte war die Kenntnis ihrer optischen Reinheit unerläßlich. Wir haben für diese Untersuchungen die 1H‐NMR‐Spektroskopie unter Verwendung eines chiralen Verschiebungsreagenzes eingesetzt.
Mehrfunktionelle N‐Tenside. IV. Synthesen hydroxy‐ und chloralkylierter Amine — Struktureinfluß auf die Extraktion von Zinkionen aus salzsauren Lösungen
Authors: Schade W. , Beger J. , Jacobi R. , Neumann R. 
Published: December 2004

Polyfunctionalized N‐Tensides. IV. Synthesis of Hydroxy‐ and Chlorine Substituted Alkylamines — Structure Dependence on the Extraction of Zinc Ions from Hydrochloric AcidA few series of long‐chained amines with or without further functional groups in the shorter alkyl chains were synthesised and checked for their extraction power for zinc ions. The extrability of zinc increase in the order secondary tertiary quarternary amino function, is independent of the length of the longest alkyl chain between ten and sixteen carbon atoms and increase with a given substituent R in the order OH ≃ H < Cl.In general there are only small differences between most of the checked amines.
Über die Pyrolyse von Pent‐1‐en‐3,3‐d2
Authors: Kopinke F.‐D. , Bach G. , Ondruschka B. , Rennecke D. , Zimmermann G. 
Published: December 2004

On the Pyrolysis of Pent‐1‐ene‐3,3‐d2The distribution of deuterium in the main products of the thermal decomposition of pent‐1‐ene‐3,3‐d2 at 550 to 650°C was studied and interpreted. The results include conclusions on kinetic isotope effects, on relative reactivities of different CH‐bonds, and on the importance of nonterminal radical addition. It is shown that butadiene‐d2 detected in the isotopically labeled butadiene fraction is a reliable target molecule for the homoallylic rearrangement of the pent‐1‐ene‐4‐yl‐3,3‐d2 radical.
Reaction of [Fe(DMF)3Cl2][FeCl4] Complex with Some Phenolic Substrates
Authors: Varma Manju , Varma Rajender S. , Parthasarathy Madhanam R. 
Published: December 2004

Reaktion des [Fe(DMF)3Cl2] [FeCl4]‐Komplexes mit einigen Phenol‐DerivatenDer Anwendungsbereich des [Fe(DMF)3Cl2] [FeCl4]‐Komplexes, der in der biomimetischen Synthese einiger Naturprodukte angewendet wird, wurde weitergehend an Phloroglycinol‐ und Resorcinol‐Systemen untersucht.Es wurde keine oxidative Dimerisierung beobachtet. Die Chlorierung der Methylengruppe und die Cyclisierung der entsprechend substituierten o‐Hydroxyacetophenone zu den Cumaran‐3‐on‐Derivaten laufen nebeneinander ab.
Elektrochemische Oxydation organischer Verbindungen in Fluorsulfonsäure. IV. Voltammetrische Untersuchungen zur Bildung und zum anodischen Verhalten einiger Benzylkationen und Arenium‐Ionen
Authors: Rudenko A. P. , Sarubin M. Ja. , Pragst F. 
Published: December 2004

Electrochemical Oxidation of Organic Compounds in Fluorosulfuric Acid. IV. Voltammetric Investigation of the Formation and of the Anodic Behaviour of Some Benzyl Cations and Arenium IonsThe anodic behavior of a series of benzylic alcohols, ethers or acetates 1–10, benzyl cyanides 11–21 and aromatic hydrocarbons 22–35 is investigated by cyclic voltammetry in fluorosulfuric acid at −76°C. The oxidation of the benzyl cations ArCH+2 formed from a part of the benzylic compounds leads at potentials by 0,7 to 0.8 V more positive than those of the neutral compounds with addition of SO3F− to stable cation radicals ArCH2OSO2F+. In a further oxidation step another CH3‐group is functionalized to CH2OSO2F. The anodic peak potentials of the arenium ions are by about 1.1 V more positive than those of the nonprotonated hydrocarbons. The dissociation equilibrium of ArCH2OSO2F und the protonation equilibrium of the hydrocarbons are discussed in terms of the donor ability of the aromatic compounds at borderline cases.
Reaktionen von Heteroaryliminotriphenylphosphoranen mit Heterokumulenen: Synthese und Cycloadditionen α‐N‐Heteroaryl‐substituierter Carbodiimide
Authors: Bödeker J. , Courault K. , Köckritz A. , Köckritz P. 
Published: December 2004

Reactions of Heteroaryliminotriphenylphosphoranes with Heterocumulenes: Synthesis and Cycloaddition Reactions of α‐N‐Heteroaryl‐substituted CarbodiimidesN‐α‐Heteroaryl‐substituted iminotriphenylphosphoranes react with phenylisocyanate, phenylisothiocyanate, and carbon disulfide to symmetrical and unsymmetrical α‐heteroaryl‐carbodiimides. These can not be isolated as monomeres because they behave as 1.3‐diazabutadienes predominantly and form 4+2‐cycloadducts. The monomeric intermediates cyclodimerize to the 1.3.5‐triazines 5 resp. 14 or react by the same scheme both with phenylisocyanate and with phenylisothiocyanate to give the 1.3.5‐triazines 4, resp. 12. In competition with this reaction a 2+2‐cycloaddition takes place, hence there follow numerous by‐products. The structure of 1.3.5‐triazines is determined from hydrolysis to guanidines 6 and on the basis of spectroscopic methods.
Antiviral wirksame Koordinationsverbindungen des Palladiums mit Pyrid‐2‐yl‐aminen
Authors: Heyn B. , Schröer H.‐P. 
Published: December 2004

Antiviral Active Complexes of Palladium Chloride with 2‐Pyridine Amines2‐Pyridine amines (L) form complexes with palladium chloride LPdCl2OH2 and L2PdCl2, respectively. The synthesis and analytical characterisation, ir‐spectra, n.m.r.‐spectra of these complexes with L = 2‐pyridine amine, 4‐methyl‐2‐pyridine amine and 6‐methyl‐2‐pyridine amine and of π‐allyl palladium chloride 4‐methyl‐2‐pyridine amine are described.
Dicyclopentadienoxidation. I, Unkatalysierte Flüssigphasenoxidation von Dicyclopentadien
Authors: Schnurpfeil D. 
Published: December 2004

Dicyclopentadiene Oxidation I. Uncatalyzed Liquid‐Phase Oxidation of DicyclopentadieneDicyclopentadiene is oxidized by molecular oxygen to a mixture of the monoepoxides 2 and 3. The identification of the epoxides 2, 3 and 4 was executed with authentic samples prepared by epoxidation with peracetic acid or with tert‐butylhydroperoxide in the presence of MoO2(acac)2acac — Acetylacetonat

The main product is the substituted norbornene oxide
2
. Allylic oxidation is also observed. Remarkable amounts of hydroperoxides can be determined iodometrically. The formation of allylic oxidation products
7
,
8
,
9
and
10
was proved by GC‐MS‐analysis. It is shown that in the uncatalyzed liquid phase oxidation of dicyclopentadiene no more than 50% of epoxides are formed. The bisepoxide
4
was found in small amounts only at higher conversions of the dicyclopentadiene.
Zum Konformationsverhalten isomerer Phenylpyrimidine — Molekül‐ und Kristallstruktur von 5‐Chlor‐2‐(4‐n‐hexyloxyphenyl)‐pyrimidin
Authors: Rapthel I. , Hartung H. , Richter R. , Jaskólski M. 
Published: December 2004

On the Conformational Behaviour of Isomeric Phenyl Pyrimidines — Molecular and Crystal Structure of 5‐Chloro‐2‐(4‐n‐hexyloxyphenyl)‐pyrimidineThe title compound crystallizes in the triclinic space group P1 with a = 979.6(1) pm, b = 1048.8(3) pm, c = 1629.9(1) pm, α = 89.51(1)°, β = 100.62(1)°, γ = 71.50(1)° and four molecules per unit cell. The structure has been solved by direct methods and refined to a final R value of 0.058. The molecules adopt a fully stretched and nearly planar form and show a parallel arrangement in the crystal lattice. The results are discussed in relation to the conformational and mesomorphic behaviour of isomeric substituted phenyl pyrimidines.
Elektrochemische Oxidation organischer Verbindungen in Fluorsulfonsäure. V. Anodisches Verhalten aromatischer Nitroverbindungen, Nitrile, Amine, Acetamide und Oxime
Authors: Rudenko A. P. , Sarubin M. Ja. , Pragst F. 
Published: December 2004

Electrochemical Oxidation of Organic Compounds in Fluorosulfuric Acid. V. Anodic Behaviour of Aromatic Nitrocompounds, Nitriles, Amines, Acetamides, and OximesThe anodic behaviour of a series of methyl substituted nitrobenzenes, benzonitriles, aniline derivatives, acetanilides and acetophenone oximes was investigated by cyclic voltammetry at platinum electrodes in HSO3F at −76°C. With the exception of the parent compounds and partly of the monomethyl derivatives relatively stable cation radicals could be detected. In a second anodic wave in many cases the functionalization of a CH3‐group to CH2‐OSO2F took place. From a comparison of the peak potentials and from the dependence of the voltammetric curves on the scan rate follows that the aniline derivatives are oxidized without deprotonation of the −NH3+ group, whereas for the nitrocompounds, nitriles and acetanilides a deprotonation of the functional group is coupled with the oxidation, and the cation radicals are stable onyl in the deprotonated state. A kinetic study of the subsequent reaction of some nitrocompounds was made and the deviating behavior of some acetanilides was found to be due to the anodic dimerization to benzidine derivatives.
Kinetische Untersuchungen der Reaktionen von Methylradikalen mit Allen
Authors: Scherzer K. , Claus P. , Dabbagh M. 
Published: December 2004

Kinetic Studies of the Reactions of Methyl Radicals with AlleneThe addition of methyl radicals to allene has been studied in the temperature range 573…595 K. The methyl radicals were produced by thermal decomposition of azomethane. It has been shown that the additions take place with a very high selectivity at the terminal carbon atoms in allene. The rate constant k2 of the addition can be expressed by the following Arrhenius equation:
Theoretische Untersuchungen zum Zerfallsgleichgewicht des Harnstoffs in Gasphase und in wäßriger Lösung
Authors: Schädler H. D. , Schroth W. , Weiss C. 
Published: December 2004

Theoretical Investigations on the Decomposition Equilibrium of Urea in Gaseous State and Aqueous SolutionThere is empirical evidence that among the two possible decomposition equilibria of urea in the gaseous and aqueous states the desammonation process prevails. In the present work the thermodynamic and kinetic conditions of desammonation and dehydration based on intramolecular mechanisms were examined by means of quantum chemical methods. The application of MNDO method yields correct structural data, dipole moments and ionisation potentials; the solvation is taken into account using NDDO based solvation and reaction field models. Maximum deviations concerning enthalpies of formation in π‐electron rich compounds reach up to 40kJ/mole. A detailed examination of the energy hyperfaces reveals that the dehydration is kinetically hindered by a significantly high activation barrier. This situation is not essentially altered by taking into account nonspecific solvent effects in aqueous solution.
Copper(II) Complexes of Pyrophthalone and Iminopyrophthalone
Authors: Bontchev P. R. , Mitewa M. , Minchev S. , Kashchieva M. , Mechandjiev D. 
Published: December 2004

Kupfer(II)‐komplexe von Pyrophthalon und IminopyrophthalonKupfer(II)‐komplexe von Pyrophthalon (PPH) und Iminopyrophthalon (IPH) wurden synthetisiert und ihre Struktur mit Hilfe von Molekül‐ und ESR‐Spektroskopie und magnetischer Suszeptibilität untersucht. Es wurde festgestellt, daß die Komplexe mit einem Metall‐Ligand‐Verhältnis von 1:2 und mit einer Struktur eines verzerrten Tetraeders gebildet werden.Die IR‐Daten zeigen daß die koordination durch das O‐Atom der Enol‐From der Liganden und dem N‐Atom des Pyridinringes realisiert wird
Über die Autoxidation von Vinylcylopentan, Vinylcyclohexan und 4‐Vinylcyclohex‐1‐en
Authors: Biela R. , Bilas W. , Ihsan U. , Pritzkow W. , Schmidt‐Renner W. 
Published: December 2004

Autoxidation of Vinylcyclopentane, Vinylcyclohexane, and 4‐Vinylcyclohex‐1‐eneThe title olefins were oxidized with molecular oxygen at 75–80°C. About 40% of the oxygen absorbed were found by iodometric titration as peroxidic oxygen. The reaction products were analyzed by a combination of chemical methods, gas chromatography, and 13C‐n.m.r.‐spectroscopy.Vinylcyclopentane and vinylcyclohexane are attacked preferably at the tertiary allylic C‐H‐bonds giving almost equimolar mixtures of the corresponding allylisomeric hydroperoxides. In the case of 4‐vinylcyclohex‐1‐ene the C‐H‐bonds in position 6 are preferably attacked, but products of attack on the other allylic C‐H‐bonds also could be identified.In all cases the amount of products which could not be detected gaschromatographically was determined by balance experiments in the presence of an internal standard.
Chloro‐nitrosyl‐molybdän‐Komplexe als Epoxidationskatalysatoren. II. Epoxidringöffnungs‐inaktive Katalysatoren
Authors: Gonzales O. , Schäfer R. , Schnurpfeil D. , Seyferth K. , Taube R. , Mohai B. 
Published: December 2004

Chloro‐nitrosyl Molybdenum Complexes as Epoxidation Catalysts. II. Catalysts Inactive in Epoxide Ring‐opening ReactionChloro‐nitrosyl molybdenum complexes which are active in the epoxidation reaction do not catalyze the consecutive epoxide ring‐opening reaction if the coordinated ligand can form a strong transition metal‐ligand bond. The temperature of the cleavage of the ligand from the central atom obtained by derivatographic measurements characterizes the strength of this bond. The epoxide ring‐opening activity can be demonstrated by the initial reaction rate, by the conversion of the initial epoxide and by the yield of the ring‐opening products 1 and 2 obtained in the reaction of 1, 2‐epoxyoctane with ethanol in chlorobenzene at 100°C. High temperatures of ligand cleavage correspond with low conversions of the initial epoxide, low initial reaction rate and a low ratio of the isomers 2/1.
Kinetics of Dimerization of Amines by hydrogen peroxide in the presence of ferrous sulphate as catalyst
Authors: Ahmad Iftikhar , Rauf A. M. A. , Saeed Kamal M. 
Published: December 2004

Kinetik der Dimerisierung von Aminen durch Wasserstoffperoxid in Gegenwart von Fe(II)SO4 als KatalysatorDie Kinetik der Dimerisierung von Diethyl, n‐Butyl‐ und tert.‐Butylamin durch Wasserstoffperoxid in Gegenwart von Fe(II)‐Ionen wurde untersucht. Die Reaktion ist bezüglich Fe(II)‐Ionen und der Amine 1. Ordnung und 0. Ordnung betreffs Wasserstoffperoxid. Produkte der Dimerisierungsreaktionen sowie einige ihrer kristallinen Derivate wurden erhalten und identifiziert. Die Aktivierungsenergien für Diethyl‐, n‐Butyl‐ und tert.‐Butylamin betragen 153, 130 bzw. 105 KJ mol−1. Ein Reaktionsmechanismus wurde aufgrund der experimentellen Beobachtungen vorgeschlagen.