bluuebunny/crossref_metadata_2025 huggingface dataset:
1H-NMR- und IR-Spektren der Formhydroxamsäure und ihres Natriumsalzes
Authors: Fritz H. P. , Stetten O. E. Von
Published: March 2015

Es werden das 1H-NMR- sowie das vollständige IR-Spektrum der Formhyroxamsäure und ihres Natriumsalzes angegeben und diskutiert.
Ubergangsmetallchalkogenverbindungen.
Authors: Müller A. , Baran E. J. , Bollmann F. , Aymonino P. J.
Published: March 2015

Die Elektronenspektren des OsO3N⊖-Ions in Wasser und flüssigem Ammoniak werden gemessen und diskutiert. Das Spektrum in flüssigem Ammoniak weist eine deutlich ausgeprägte Schwingungsfeinstruktur auf. Das Verhalten des Ions in wäßriger Lösung wird untersucht und die Äquivalentleitfähigkeit bei unendlicher Verdünnung gemessen. Weiterhin erfolgt eine Diskussion der Schwingungseigenschaften und Bindungsverhältnisse.
Potentiometric Study on the Composition and Stability of Beryllium Complexes of 3,5-Dinitrosalicylic Acid
Authors: Dube S. S. , Dhindsa S. S.
Published: March 2015

The complexation of beryllium (II) with 3,5-dinitrosalicylic acid in aqueous 0.1 ᴍ KNO3 medium has been investigated potentiometrically, which evince the formation of 1 : 1 and 1 : 2 complexes, predominating in the pH ranges 2.7 —4 and 4—9, respectively. The values of log K1 and log K2, determined by alternative methods, have been found to be 7.13 and 5.29 respectively. The value of overall change in free energy (ΔF) accompanying the reaction has been found to be —17.34 Kcal/mole at 35°C.
Chloroazobenzenes: IR and UV Characteristics
Authors: Linke H. A. B. , Pramer D.
Published: March 2015

The spectral characteristics of thirteen symmetrical chlorosubstituted azobenzenes were determined. Comparisons of their UV spectra revealed a relation between the substituents and the hypsochromic maxima. The IRN= N stretching vibrations of chloroazobenzenes ranged from 1535—1585/cm and were correlated with the degree and positioning of the chlorosubstitutions.
Synthese eines Triacontatripeptids der Sequenz 31-63 des Schweine-Proinsulins
Authors: Geiger Rolf , Jäger Georg , König Wolfgang , Volk Alexander
Published: March 2015

The synthesis of the sequence 31 — 63 of the porcine proinsulin connecting the B- and A-chain is described.
Chemilumineszenz von Redoxreaktionen mit molekularem Sauerstoff
Authors: Stauff J. , Nimmerfall F.
Published: March 2015

Um den Mechanismus der Reaktion des Cysteins mit molekularem Sauerstoff in Gegenwart von Komplexen des zweiwertigen Kupfers als Katalysatoren zu ermitteln, wurden Messungen der Chemilumineszenz, der Sauerstoff- und der Cysteinkonzentration in Abhängigkeit von der Zeit vorgenommen. Variation der Konzentration der Reaktionsteilnehmer führte zu Meßergebnissen, die die Aufstellung eines Reaktionsschemas gestattete. Das hieraus abzuleitende System nichtlinearer Differentialgleichungen für die Reaktionsgeschwindigkeiten wurde in einem Analogrechner gelöst, wobei Übereinstimmung zwischen Rechnung und Meßergebnissen sowohl für die Zeitabhängigkeit als auch für die Konzentrationsabhängigkeit gefunden wurde.
Beiträge zur Chemie des Schwefels 96
Authors: Fehér F. , Kurz D.
Published: March 2015

Der nucleophile Abbau von Se, S7, S8 und S12 mit Diphenyl- (o-tolyl) -phosphin zu Diphenyl-(o-tolyl) -phosphinsulfid wurde in CS2 untersucht. Die Reaktion ist annähernd 2. Ordnung. Für die Reaktivität der Schwefelspezies gilt folgende Reihenfolge: S6S12 ≅ S7S8.
Further Evidence for an Optical Response of Chloroplast Bulk Pigments to a Light Induced Electrical Field in Photosynthesis
Authors: Emrich H. M. , Junge W. , Witt H. T.
Published: March 2015

1. In the primary processes of photosynthesis a rather strong electric field (~105 V/cm) is set on across the thylakoid membrane. This field has been detected by absorption changes attributed to chlorophyll-b (1).

2. In this paper it is demonstrated that the optical response to the field is not restricted to chlorophyll-b. Responses of the other bulk pigments which are embedded in the thylakoid membrane, as several types of chlorophyll-a and carotenoids, are detected.
Beiträge zur 31P-KMR-Spektroskopie IV
Authors: Latscha H. P. , Hormuth P. B. , Vollmer H.
Published: March 2015

Chemische Verschiebungen von Phosphorkernen in Verbindungen mit Phosphor der Koordinationszahl 3, 4, 5 und 6 sind tabellarisch zusammengestellt und werden z. T. diskutiert. Die Kopplungskonstanten JPH und JPF sind — soweit bekannt — angegeben.
Pulsradiolytische Untersuchung primärer Schritte der Oxidation von Aminen in wäßriger Lösung / Pulsradiolytic Investigation of the Primary Steps in the Oxidation of Amines in Aqueous Solution
Authors: Wigger A. , Grünbein W. , Henglein A. , Land E. J.
Published: March 2015

The OH radical rapidly reacts with CH3NH2 and C6H5NH2 but reacts slower with CH3NH3
⊕, respectively C6H5NH3
⊕. In the reaction with methylamine. the complex

is formed which loses water with τ½=26 µs. The addition of OH to the aromatic ring of aniline occurs in 20% of the reactions. The hydroxy-amino-cyclohexadienyl radical has its absorption maximum at 3500 A. It decays by elimination of water to yield the anilino radical C6H5NH (τ½= 5.7µs at pH = 7), H⊕ and OH⊖ ions catalyse the decay. In 80% of the reactions. · OH adds to the amino group of aniline. The subsequent loss of water or of OH⊖ occurs rapidly (<1 µs). However, the basic form of the addition complex decays much more slowly (τ½=10 µs at pH= 13.7). The pK-value of the equilibrium

is estimated to be equal to 11 — 12. The absorption spectra of C6H5NH2® and the pK-value of 7.0 of C6H5NH2
⊕ first described by LAND and PORTER are confirmed.
Die Wirkung einiger Orotaldehyd-Derivate als Orotsäureantagonisten bei Neurospora Crassa
Authors: Golovinsky Evgeny , Spassov Alexander , Roussinova Elisaveta
Published: March 2015

Es wird die Wirkung des Orotaldehydoxims, des Orotaldehydthiosemicarbazons, des Orotaldehydsemicarbazons und des Orotaldehydphenylhydrazons als potentielle Antimetabolite der Orotsäure auf das Wachstum von Neurospora crassa untersucht. Die höchste wachstumshemmende Wirkung zeigt das Orotaldehydthiosemicarbazon. Der wuchshemmende Effekt der untersuchten Orotaldehyd-Derivate wird durch Orotsäure enthemmt.
Vermehrte RNS-Synthese in Makrophagen während der Phagocytose antigenen Materials / Increased RNA Synthesis in Macrophages during Phagocytosis of Antigenic Materials
Authors: Hartmann Klaus-Ulrich
Published: March 2015

Macrophages have been cultured as uniform cell populations. These cells incorporate uridine but not thymidine into their nucleic acids during the culture period. Sheep erythrocytes in the presence of macrophage cytophilic antibodies were agglutinated to rosettes and phagocytized. Cytophilic antibodies did not have to be species specific; phagocytosis was not complement-dependant. During phagocytosis, incorporation of H3-uridine into the RNA was increased. Sucrose gradient analysis showed that the increase in uridine incorporation was mainly due to increased m-RNA synthesis.
Studies on Mouse Leukemia Viruses / II. Nachweis eines virusspezifischen Hämagglutinins
Authors: Schäfer Werner , Szántó Ján
Published: March 2015

In Präparaten von Mäuse-Leukämie-Viren (MLV) läßt sich ein Hämagglutinin nachweisen, wenn man sie mit Neuraminidase und Phospholipase C bebrütet. Die entsprechende, mit Hammel-Erythro-cyten reagierende Komponente besitzt die Sedimentationseigenschaften und die Schwimmdichte der MLV-Partikeln. Ihre hämagglutinierende Wirksamkeit wird durch typspezifisches, nicht aber durch typfremdes Antiserum inhibiert. Aus diesem Verhalten wird geschlossen, daß das nachgewiesene Hämagglutinin einen virusspezifischen Bestandteil der MLV-Partikeln repräsentiert, der wahrscheinlich mit einem typspezifischen Antigen gekoppelt ist. In den unbehandelten Viruspartikeln scheint das Hämagglutinin durch Glykoproteide und Phospholipoide, die wahrscheinlich von der Membran der Wirtszelle herstammen, in seiner Funktion behindert zu werden.
Satelliten-Desoxyribonucleinsäure in Gonaden und somatischem Gewebe von Acheta domestica L. / Satellite-Deoxyribonucleic Acid in Gonads and Somatic Tissue of the Cricket, Acheta domestica
Authors: Hansen-Delkeskamp Elisabeth
Published: March 2015

In all analysed tissues of Acheta domestica two DNA fractions are present. The amount of the heavier satellite fraction is very small, but considerably increased in the ovaries of young females, which possess an extrachromosomal DNA body in the oocyte nucleus. Evidence is presented that the heavier fraction is at least partly identical with the DNA body.
NMR-spektroskopische Untersuchungen über zwischenmolekulare Wechselwirkungen bei Benzolderivaten und Pyrrol / NMR-Spectroscopic Investigation of the Intermolecular Reactions of Benzene Derivatives and Pyrrole
Authors: Perkampus H.-H. , Krüger U. , Krüger W.
Published: March 2015

The proton chemical shifts of aromatic compounds are strongly concentration dependent. Moreever, for molecules with a dipole moment a temperature dependence of the proton chemical shifts is observed. For hemellitone, p-methylanisole, o-chlortoluene, p-chlortoluene, pyrrole and N-methyl-pyrrole the enthalpies of a dipole-dipole association between -0,7 and -1,8 Kcal could be estimated by NMR measurements combined with the temperature dependence in the whole range of the molefraction (0 → 1).
Die Konformationsänderungen des Pottwal-Metmyoglobins bei der reversiblen Denaturierung im pH-Bereich 7 bis 1
Authors: Kirste R. G. , Schulz G. V. , Stuhrmann H. B.
Published: March 2015

Der native Zustand der Myoglobinmoleküle in wäßriger Lösung ohne Salzzusatz bleibt zwischen pH 7 und pH 4,6 unverändert. Durch HCl-Zugabe erfolgt bei pH 4,6 bis 4,1 eine schwache Assoziation ohne eigentliche Konformationsänderung. Das mittlere Mol.-Gew. steigt bis auf das 1,5-fache des ursprünglichen Wertes. Diese Assoziation erreicht bei pH 4,1 ein Maximum und geht unterhalb dieses pH-Wertes wieder zurück. Bei etwa pH 3,7 beginnt dann die Auffaltung der nativen Struktur zum Knäuel und die Ablösung des Hämins. Unterhalb von pH 2 wird eine mit abnehmendem pH zunehmende Assoziation beobachtet.

Wenn die Säuredenaturierung bei der Ionenstärke 0,1 durchgeführt wird, erfolgt die erste Assoziation (pH 4,6 bis 4,1) in verstärktem Maße: Das mittlere Mol.-Gew. steigt auf das 12-fache des nativen Wertes. Der Rückgang der Assoziation bei weiterem Ansäuern ist jetzt unvollständig. Der Salzzusatz bewirkt außerdem, daß die Auffaltung der Molekülsltruktur und die Ablösung der Hämgruppe schon bei pH 4,3 stattfinden.

Die Konformationsänderungen des Myoglobins bei der Säuredenaturierung sind reversibel. Die Rekombination zwischen Apomyoglobin und Häminchlorid erfolgt sehr langsam, wahrscheinlich, weil in dem in Frage kommenden pH-Bereich Häminchlorid nicht molekulardispers, sondern kolloid gelöst ist.
Unterchungen über den Transport von Stoffen durch peritrophische Membranen / Investigation of the Transport of Material through Peritrophic Membranes
Authors: Zimmermann U. , Peters W. , Hallstein H.
Published: March 2015

The tubular peritrophic membranes of Calliphora are formed by the secreting cells of the proventriculus at a rate of 3.5 ± 1 mm per hour. It has been estimated that each of these cells produces its own weight in membrane material in about one day.

Autoradiography of peritrophic membranes from flies injected with glucose-C 14 show cross bands as well as longitudinal bands, indicating a periodic incorporation of radioactive material and therefore a different chemical composition, which may be of importance for transport phenomena.
α Amanitin, a specific inhibitor of transcription by mammalian RNA-polymerase
Authors: Seifart K. H. , Sekeris C. E.
Published: March 2015

Evidence has been presented that α amanitin. the potent bicyclic polypeptide toxin of the toadstool amanita phalloides inhibits transcription by purified RNA polymerase from rat liver nuclei. This inhibition is highly specific for the mammalian enzyme, since it does not impede the same reaction catalyzed by the enzyme from E. coli thus rendering an interaction between the template and inhibitor very unlikely. α Amantitin is a very potent inhibitor and calculations show an approximate stoichiometry of 1 : 1 between enzyme and inhibitor. In addition, evidence is formarded suggesting that the inhibitor allows chain initiation to occur, but abruptly inhibits elongation of RNA chains.
Zur Wirkung von Desoxyribonucleinsäure und Heparinoiden auf den Nucleinsäurestoffwechsel der Maus
Authors: Tempel K.
Published: March 2015

24 Stdn. bis 6 Wochen nach 3-mal im Abstand von 24 Stdn. wiederholter i.v. Injektion von Polyvinylsulfat (PVS), Pentosanpolysulfoester (SP54®) und Mucoitinpolysulfat (Heparin Novo®) in Dosen von 25,0 mg, 62,5 mg bzw. 12500 IE/kg K.-Gew. sowie 24 Stdn. nach 5-mal im Abstand von 1 Tag wiederholter i.v. Injektion von hoch- und niedrigmolekularer DNS in Dosen von 12,5 — 100 mg/kg wurde das Verhalten von Frischgewicht, DNS, Protein, DNase I und DNase II in Lunge, Thymus, Leber, Milz und Nieren der Maus untersucht.

Die wesentlichsten Ergebnisse lassen sich wie folgt zusammenfassen :

1. In Abhängigkeit von Polyanion und Dosis reagierte die Thymusdrüse hypo- oder hyperplastisch. Zu proliferativen Veränderungen kam es in Milz, Lunge, Leber und Niere.

2. Nach Heparinoidbehandlung blieb der Proteinbestand von Leber und Niere hinter dem gleichzeitig erfolgenden Zuwachs von Organgewicht und DNS-Gehalt zurück.

3. Unter dem Einfluß von PVS und SP54® verminderte sich die DNase I-Aktivität von Leber und Niere mindestens 4 Wochen lang um durchschnittlich 30 — 40 Prozent. Zu Aktivitätszuwachs kam es im Verlauf der DNS-Behandlung.

4. PVS und DNS führten in allen untersuchten Organen zu einem maximal 200-proz. Aktivitätszuwachs der sauren DNase.

5. Den Untersuchungen zufolge kommen Elemente des lymphoreticulären Gewebes als gemeinsamer Angriffspunkt von anionischen Makromolekülen in Betracht. Darüber hinaus lassen sich auch in vivo Wirkungen auf den Proteinstoffwechsel nicht ausschließen.
Mit Kohlensäure Verbundenes und Freies Chlorophyll.
Authors: Warburg Otto , Krippahl Günter , Lehmann Arnold
Published: March 2015

Beweis, daß die Funktion des Chlorophylls bei der Photosynthese nicht nur die Absorption des Lichts ist, sondern auch die Umwandlung der Lichtenergie in chemische Energie. Chlorophyll ist also auch der chemische Katalysator der Photosynthese.

Der Beweis wurde erbracht durch Messung des verbundenen und des freien Chlorophylls während der Photosynthese sowie der O2-Entwicklung aus dem verbundenen Chlorophyll, deren Quantenausbeute = 1 ist und aus dem freien Chlorophyll, deren Quantenausbeute = 0 ist.
Wachstumsparameter in normalen und durch Actinomycin verlängerten Zellzyklen von Tetrahymena / Growth Parameters in Normal and Actinomycin-induced prolonged Cell Cycles of Tetrahymena
Authors: Cleffmann Günter
Published: March 2015

Actinomycin in low concentration (0,2 μg/ml — 0,5 μg/ml) prolongs the average duration of the cell cycle of Tetrahymena considerably, but does not inhibit cell division completely. Some parameters of the growing cell have been tested in cell cycles extended in this way and compared to those of normally growing cells. The RNA synthesis of treated cells is reduced to such an extent that the RNA content per cell decreases during the prolonged cell cycle. Nevertheless cell growth, protein synthesis and DNA replication proceed at almost the same rate as in untreated cells. These findings indicate that the presence of actinomycin does not interfere with RNA fractions necessary for growth but reduce the synthesis of RNA fractions which are essential for cell division. Therefore a longer period is needed for their accumulation.
Spezifische Störung von Entwicklung und Enzymbildung der Plastiden höherer Pflanzen durch hohe Wachstumstemperaturen
Authors: Feierabend J. , Berger Ch. , Meyer A.
Published: March 2015

1. At elevated growth temperatures between 32° and 34 °C synthetic processes of rye seedling plastids like formation of chlorophyll and photosynthetic enzymes (carboxydismutase) are nearly completely prevented, whereas formation of protein, of non-photosynthetic enzymes, and total leaf growth are little or not affected.

2. In the dark, carboxydismutase, which may be taken as representative of plastid behavior, fails to appear at 32°C, whereas it is normally synthesized at 22°C. Plastids of etiolated seedlings remain small at 32°C. Early formation of prolamellary bodies is normal but further differentiation of plastids cannot proceed as usual. They lack larger thylakoids, and ribosomes cannot be detected. But many osmiophilic globuli are accumulated, and characteristic tubulus like structures, which are not found at 22°C, appear in great number.

3. In light the ability of the seedlings to form chlorophyll sharply declines above 28°C. Between 32° and 34°C the leaves still reach full development but are rather chlorotic. Carboxydismutase remains extremly low in far-red as well as in red or blue light.

4. Carboxydismutase activity, which is already present, is not destroyed by high temperature, neither is the synthesis of this enzyme directly inhibited, if it is already proceeding. Maximum sensibility to the effect of high temperature is found in the youngest stages before the formation of photosynthetic enzymes has started.

5. Application of kinetin — alone or in combination with an auxin — does not restore formation of carboxydismutase at 32°C to normal rates of synthesis as observed at 22°C.

6. When seedlings are grown in 32°C between 24 and 96 hours of germination and then put back to 22°C the formation of carboxydismutase is not started again in the dark. But when they are kept in light after having been returned to 22°C a new increase of the enzyme as well as of chlorophyll is initiated.

7. The mode of action of high temperature is discussed. In many respects it corresponds to the well-known heat-bleaching effect of the unicellular alga Euglena.
Die Kristallstrukturen der Verbindungen Ca2Sb und Ca2Bi / The Crystal Structures of Ca2Sb and Ca2Bi
Authors: Eisenmann B. , Schäfer Herbert
Published: March 2015

Ca2Sb and Ca2Bi have been prepared and their structures determined. The two compounds are isotypic and crystallize tetragonal, space group I4/mmm. (Ca2Sb: α = 4.67 ± 0.02 Å, c = 16.28 ± 0.03 Å. Ca2Bi: α = 4.72 ± 0.02 Å, c = 16.54 ± 0.03 Å).

There are very short Ca-Ca-distances in both compounds, the element(V)-atoms are coordinated only to Ca-atoms.
Stereochemie des fünfbindigen Phosphors: Kristallstrukturen von zwei Oxyphosphoranen / Stereochemistry of Five-coordinated Phosphorus: Crystal Structures of Two Oxyphosphoranes
Authors: Wunderlich Hartmut , Mootz Dietrich , Schmutzler Reinhard , Wieber Markus
Published: March 2015

The crystal structures of (C6H4O2)2PR with two chelating catechol residues and R = F (1) and CH3 (2), respectively, at a phosphorus atom were determined. The observed geometry at this atom is between a trigonal bipyramid and a tetragonal pyramid in 1 and close to a tetragonal pyramid in 2. These results are discussed in the light of existing knowledge and theories on five-coordination of phosphorus.
Die Schwingungsspektren von Cs2
50Cr2O7 und Cs2
53Cr2O7 / Vibrational Spectra of Cs2
50Cr2O7 and Cs2
53Cr2O7
Authors: Mattes Rainer , Königer Frank , Müller Achim
Published: March 2015

The infrared spectra of the compounds Cs2
50Cr2O7 and Cs2
53Cr2O7 have been measured. An approximate normal coordinate analysis has been performed on the basis of these frequencies. The result confirms the assignment of the band at 70-90 cm -1 to the CrOCr deformation mode.
Reaktionen von OH-Radikalen mit Acetaldehyd in wäßriger Lösung in Gegenwart von Sauerstoff / Reactions of OH-Radicals with Acetaldehyde in Oxygenated Aqueous Solution
Authors: Schultze Hartmut , Schulte-Frohlinde Dietrich
Published: March 2015

γ-Irradiation of aqueous acetaldehyde in the presence of N2O and O2 at 0°C leads to the formation of 1.5 molecules of acetic acid per OH radical consumed. As intermediates peroxidic compounds are produced with a half life of about 50 min. H2O2 is not formed.

The primary step of the reaction is the interaction of the OH radical with acetyldehyde yielding water and acetyl radicals which add oxygen. The so formed acetylperoxy radicals form peroxidic intermediates which decompose to give oxygen, acetic acid, and peracetic acid. The peracetic acid interacts with additional acetaldehyde forming a peroxide that is converted into two molecules of acetic acid in a first order process.

At temperatures above 10°C, a chain reaction takes place leading to acetic acid with a G-value of 40 at 40°C. The propagating species are the acetylperoxy and the acetyl radicals. The reaction steps are addition of oxygen to the acetyl radicals and transfer of hydrogen from acetaldehyde to the acetylperoxy radical leading to peracetic acid. In this reaction no hydrogen peroxide is formed.
Gitterschwingungsspektren, XI
Authors: Lutz Heinz Dieter , Klüppel Hans-Jürgen , Pobitschka Walter , Baasner Bernd
Published: March 2015

The assignment of the H2O libratory vibrations in crystal hydrates to the rocking or wagging vibration alternatively using the isotope shift of the HDO librations is discussed. IR spectroscopic data on BaCl2 · 2 H2O, BaBr2 · 2 H2O, SrCl2 · 2 H2O, BaCl2 · H2O, BaBr2 · H2O, SrCl2 · H2O, SrBr2 · H2O and on the deuterated compounds of these hydrates are included.
Chemie der Phosphorfluoride, XXXVII / Phosphorus-Fluorine Chemistry, XXXVII
Authors: John Klaus-Peter , Schmutzler Reinhard
Published: March 2015

The 19F NMR spectra of some PF5-base complexes (base = trimethylamine, 3-methylpyridine, 3,5-dimethylpyridine) were studied. It is concluded that the spectra cannot be interpretated on a first order basis, and have to be rationalized in terms of an AB4X spin system; this was confirmed by computer simulation of theoretical spectra and their comparison with experimental spectra.
Über Reaktionen mit Betain, IX / Reactions with Betaine, IX
Authors: Wittmann Helga , Petio Franz Adolf
Published: March 2015

Dimethylsulfoniumphenacylbromide reacts with arylisocyanates in the presence of N-ethyldiisopropylamine to stable dioxo-S-ylides (1-5). Compounds 6-16 are obtained by variation of the starting sulfonium salts and isocyanates. Tolyl-2,4-diisoyanate yields with dimethylsulfoniumphenacylbromide the 1:2 adduct 17, while with the corresponding triphenylphosphoniumbromide the 1:1 adduct 18, with a free isocyanate group, is obtained.
Crystal Structure Determination of N-(para-Chlorophenyl) Phthalimide and Analysis of its Formation from N-(para-Chlorophenyl) Phthalanilic Acid
Authors: Farmer B. L. , Lando J. B.
Published: March 2015

Crystalline N-(para-chlorophenyl) phthalanilic acid undergoes a topochemical cyclization reaction with the elimination of water yielding crystalline N-(para-chlorophenyl) phthalimide. The crystal structure of the imide product has been determined and compared to the previously determined structure of the reactant. The reaction from this particular crystalline phase of N-(para-chlorophenyl) phthalanilic acid is enhanced by the presence of a high energy molecular conformer of the acid, little molecular motion necessary for reaction, and only a minor rearrangement required to pack into the imide structure after the reaction. A detailed molecular mechanism for this reaction is proposed involving some bond rotation, but little movement of the molecule as a whole.
Studies on 1,2,4-Triazine Derivatives VI
Authors: Mansour A. K. , Awad S. B. , Antoun S.
Published: March 2015

Treatment each of 3-mercapto-1,2,4-triazine derivatives (1 a) and (2b) with alkyl (or aryl) halides afforded the corresponding 3-alkyl (or aryl)mercapto-1,2,4-triazine derivatives (lb-e) and (2b-e) respectively. Treatment each of compounds (lb-e) and (2b-e) with different amines effected the formation of the corresponding 3-substituted-amino-1,2,4-triazine derivatives (lg-k) and (2g-k). The 4,5-dihydro-derivatives (3 a, c, d) were obtained by reduction of the corresponding triazines (la, f, g) with different reducing agents. The structure of compound 3 d was confirmed via synthesis through another route. The triazine (1f) reacted with Grignard reagents to give the corresponding 5-alkyl(benzyl)-4,5-dihydro-1,2,4-triazine derivatives (4a-c). The antagonistic properties of the triazines (1 a-k) and (2 a-k) were tested against some Gram positive and Gram negative bacteria as well as the fungus Candida albicans.
Notizen: Markierte Verbidungen, XXI / On Labelled Compounds, XXI
Authors: Boberg Friedrich , Kresse Josef
Published: March 2015

The chlorine exchange between hexachloropropene and SbCl3-(36Cl) is retarded by electron donors. The activity of hexachloropropene-(36Cl) is a value for the donor.
Magnetic and Crystallographic Investigations of Some Rare Earth Ferrite Compounds
Authors: Drofenik M. , Zupan J. , Kolar D. , Volavšek B.
Published: March 2015

Lattice parameters and magnetic moments are given for a number of ternary compounds isomorphous with Sr2EuFeO5. These compounds are paramagnetic above 80°K. The magnetic susceptibility data can be interpreted by a simple paramagnetism.
31P- und 13C-Kernresonanzuntersuchungen an N-Trimethylsilyl-triorganophosphiniminen / Phosphorus-31 and Carbon-13 Nuclear Magnetic Resonance Investigations of N-Trimethylsilyl Triorganophosphine Imines
Authors: Buchner Wolfgang , Wolfsberger Werner
Published: March 2015

Phosphorus-31 and carbon-13 chemical shifts as well as 31P - 13C and 31P - 29Si coupling constants have been obtained from a series of ten N -trim ethylsilyl-triorganophosphine imines. The influence of alkyl substituents on the phosphorus-31 chemical shifts in these and a variety of other com pounds is explained by a mechanism of intram olecular coordination of the β-CH3 group to phosphorus using d-orbitals.
Die NMR-spektroskopische Strukturaufklärung des bei der UV-Bestrahlung von Thymin/Uracil-Gemischen in der Eismatrix entstehenden Thymin/Uracil-Mischdimeren / NMR Spectroscopic Structure Elucidation of Thymine/Uracil Mixed Dimer Prepared by UV Irradiation of Thymine/Uracil Mixtures in Ice Matrix
Authors: Fahr Egon , Pastille Reinhard , Pelz Norbert , Scheutzow Dieter
Published: March 2015

The thymine/uracil mixed dimer, formed by UV irradiation of thymine/uracil mixtures in ice matrix was isolated by fractionated crystallization. The cis/syn structure of this cyclobutane dimer was established by NMR investigation.
Magnetic Properties of Some Divalent Transition Metal Cupferron Complexes
Authors: Abou El Ela A. H. , Afifi H. H.
Published: March 2015

The magnetic susceptibilities and magnetic moments of the ammonium salt of cupferron and manganese, cobalt, nickel and copper divalent complexes are investigated. The ammonium salt of cupferron is diamagnetic while the divalent transition metal cupferron complexes exhibit paramagnetic behaviour. For manganese, cobalt and nickel cupferrates the magnetic moment is smaller than the spin-only value, which reflects the effect of the orbital angular momentum and electron delocalization. For copper cupferrate the magnetic moment is nearly equal to the spin-only value.
Complexes of Quinine with Cu(II), Ni(II), Co(II) and Cr(III) Chlorides
Authors: Tsangaris J. M. , Baxevanidis G. Th.
Published: March 2015

Quinine free base forms the following complexes with transition metal chlorides: 2 quinine · 3 CuCl2, quinine · 2 CuCl2, quinine · 2 NiCl2 · 8 H2O, quinine · 2 NiCl2, quinine 2 CoCl2 and quinine · 3 CrCl3 · 6 H2O. Comparison of the IR spectrum of the quinine free base with the spectra of the complexes leads to the assumption that the transition metal ion is coordinated with the quinuclidinic and quinolinic nitrogens. Chelation with the hydroxyl oxygen is tentatively proposed. The visible UV spectra and the magnetic moments of the complexes are also reported and discussed.
Komplexe des N.N′-Bis(o-aminobenzyl)äthylendiamins mit Cu(II) und Ni(II) / Complexes of N,N′-bis(o-aminobenzyl)ethylenediamine with Cu(II) and NI(II)
Authors: M. Tsangaris J. , Paraskewas S. M.
Published: March 2015

The synthesis, IR spectra and UV-visible diffuse reflectance spectra of the complexes [Cu(abeda)]Cl2 and [Ni(abeda)]Cl£, where abeda = N,N′-bis(o-aminobenzyl)ethylenediamine, as well as the magnetic moments of the complexes in the solid state are reported and discussed.
Notizen: Darstellung und Eigenschaften von AuOCl / Preparation and Properties of AuOCl
Authors: Schwarzmann Einhard , Schulze Erika , Mohn Jürgen
Published: March 2015

Gold(III)oxidchloride AuOCl is obtained by the treatment of Au2O3 with concentrated perchloric acid at 160°C in a sealed pyrex tube. The crystals have been characterized by X ray and IR spectrum. Above 290°C AuOCl decomposes to Cl2, O, and Au.
Notizen: Pulse Radiolysis of Selenium Containing Compounds: Selenomethionine
Authors: Tamba Maurizio , Bonora Sergio , Badiello Roberto
Published: March 2015

The pulse radiolysis of aqueous solutions of selenomethionine has been studied under both neutral and acid conditions and the transient optical absorption spectra have been observed. The reactivities of both eāq and OH radicals have been measured as well as the formation and the decay kinetics of the transient species.
Notizen: Kopplung mit dem Isotop 115Sn in zinnorganischen Verbindungen / Coupling with 115Sn in Organotin Compounds
Authors: Schumann H. , Kroth H. J.
Published: March 2015

The coupling constants 2J(1H-115Sn) of 14 methyltin compounds have been measured. They show a good agreement with the calculated values.
Zur Struktur der Selenide Cs2Pd3Se4, Rb2Pd3Se4 und K2Pd3Se4 / On the Crystal Structure of Cs2Pd3Se4, Rb2Pd3Se4, and K2Pd3Se4
Authors: Huster Jürgen , Bronger Welf
Published: March 2015

The ternary selenides Cs2Pd3Se4, Rb2Pd3Se4 and K2Pd3Se4 have been prepared by fusion reactions of alkali carbonates with palladium and selenium at 850°C. According to X-ray powder patterns (Guinier-Simon technique) Cs2Pd3Se4 is monoclinic with α= 6,493 Å, b =14,204Å, c = 6,414Å, β=120,41° and is isotypic with Cs2Pd3S4 (C 2/m, No. 12). Rb2Pd3Se4 and K2Pd3Se4 are orthorhombic and isotypic with K2Pd3S4 (Fddd, No. 70). Rb2Pd3Se4: α=11,076 Å, b = 27,092 Å, c= 6,353 Å; K2Pd3Se4: a= 10,954 Å, b = 26,196 A, c = 6,317 Å.
Paramagnetic Properties of Some Ternary Rare Earth Compounds
Authors: Drofenik M. , Zupan J. , Kolar D.
Published: March 2015

Some paramagnetic properties are given for a number of ternary rare earth compounds isomorphous with Sr2EuFeO5. Temperature variation of magnetic susceptibility obeys the Curie-Weiss law with exeptions for europium and samarium. Magnetic moments exhibited are close to that theoretically expected for the free ion except for europium whose value is a little higher.
Notizen: Darstellung von Pentacarbonylrheniumorganoplumbanen / Preparation of Pentacarbonylrhenium Organoplumbanes
Authors: Schubert Wolfgang , Haupt Hans-Jürgen , Huber Friedo
Published: March 2015

The new compounds (CH3)3Pb[Re(CO)5], (CH3)2Pb[Re(CO)5]2and (C6H5)2Pb[Re(CO)5]2 with Pb-Re bonds have been prepared from R4-nPbCln and NaRe(CO)5 with the alkali salt method, which shows differences from the analogous reactions of NaMn(CO)5 with methyllead halides. (CH3)3Pb[Re(CO)5] redistributes in acetone solution to give (CH3)2 Pb[Re(CO)5]3 and (CH3)4Pb. Br,Pb [Re(CO)5], could be synthesized by the reaction of (C6H5)Pb[Re(CO)5)2 with Br, in CHCl3. The new compounds are monomerio; according to the IR-spectra Pb is tetrahedrally surrounded and Re has idealized C4V-symmetry.
Die Struktur der Phase Li5Sn2 / The Crystal Structure of Li5Sn2
Authors: Frank Ursula , Müller Wiking , Schäfer Herbert
Published: March 2015

The crystal structure of Li5Sn2 has been determined. It crystallizes trigonal/rhomboedric, space group R3̅m—D5
3d, a = 4.74 ± 0.01 Å, c = 19.83 ± 0.03 A, c/a = 4.18. Structural relations between Li2Si, Li9Ge4 and Li5Sn2 are discussed.
Die Kristallstruktur des Kalium-tri-isocyanatocadmats KCd(NCO)3 / The Crystal Structure of KCd(NCO)3
Authors: Thiele Gerhard , Hilfrich Peter
Published: March 2015

The crystal structure of KCd(NCO)3 has been determinated by threedimensional X-ray diffraction. The crystals are orthorhombic, space group Pnma with the cell dimensions a = 999.3 pm, b = 367.1 pm and c = 1835.4 pm. The cadmium atoms are surrounded octahedrally by six N-atoms. As in the KCdCl3-structure N-bridged double chains along the c-axis are formed which are linked together by the potassium atoms.
The Interactions of Uranium Oxysulphide with the Rare Earth Oxysulphides
Authors: Komac M. , Volavšek B.
Published: March 2015

The reactions of uranium oxysulphide with selected oxysulphides of rare earths (La, Gd, Yb) and Y were investigated. Several new phases, identified as uranium-rare earth oxysulphides were found. The chemical compositions and lattice constants of those compounds were determined.
Sorption of Certain Cationic Metal-ammines in Ferric Phosphate
Authors: Bhushan Brij , Kar K. R.
Published: March 2015

Sorption of ammine complexes of Cu2+, Ni2+, Zn2+ and Cd2+ on ferric phosphate has been studied at different ionic concentration in the external solution. It has been found that qA and Kd values attain a maximum with increasing concentration (0.02 ᴹ) beyond which a fall is observed. Selectivity quotients of the exchanger material towards competing pairs of the metal ammine ions e.g. (Cu(II)—Zn(II), Cu(II)—Cd(II) and Cu(II)—Ni(II) have also been measured as a function of the concentration of the external solution. The selectivity effects in general, decrease with increase in the external concentration. The qA and selectivity follows the same trend i.e.

Zn2+ > Cd2+ > Cu2+ > Ni2+.
Quenchable High Pressure Phases of GdYbS3
Authors: Clark J. B. , Range Klaus-Jürgen
Published: March 2015

Three new modifications of GdYbS3 can be retained metastably, after quenching from high pressure and temperature. The Guinier powder data is presented and indexed. The three modifications include a cubic defect Th3P4-type phase with a = 8.310(2) Å, an orthorhombic A-type phase with a = 7.279(4) Å, b = 15.119(6) Å and c = 3.875(3) Å, and an orthorhombic U2S3-type phase with a = 10.603(5) Å, b = 3.869(3) Å and c = 10.385(5) Å. Structural relationships between the present group of structures and the structures of the rare earth sulfides with formula Ln2S3 are discussed.
Zur Struktur einer Substanz aus dem Fruchtfleisch von Melia Azadirachta Linn / The Structure of a Compound Isolated from the Fruit Pulp of Melia Azadirachta Linn
Authors: Siddiqui Salimuzzaman , Waheed Tasneem Nahid , Lücke Jürgen , Voelter Wolfgang
Published: March 2015

The isolation of a triterpenoid from the fruit pulp of Melia azadirachta Linn is described. Its structure is identified by synoptical evaluation of the data of elemental analysis, 1H NMR, 13C NMR, ABS and IR spectra.
NOTIZEN: EPR- und ligandenfeld-spektroskopische Strukturuntersuchungen an Cu(II)-Verbindungen / Investigations with Respect to the Structure of Cu(II)-compounds by EPR and Ligand Field Spectroscopy
Authors: Friebel Claus
Published: March 2015

From EPR and ligand field parameter some significant structural details of Cu(II)-compounds can be determined to a notable accuracy: a) the symmetry (tetragonal or orhombic) of Jahn-Teller distorted octahedral Cu(II)-sites, and b) the ordering of Jahn-Teller coupled Cu(II)-polyhedra with respect to each other as well as to the crystallographic axes of the Cu(II)-compound under investigation.
Reversible Solid State Redox Reactions of the Layered Carbide Ta2S2C
Authors: Schöllhorn Robert , Schmucker Wolfgang
Published: March 2015

Tantalum sulfide carbide Ta2S2C is shown to present a novel type of electronically conducting layer structure which undergoes reversible topotactic redox reactions in aqueous and nonaqueous electrolyte solutions.
Über ein neues Kupfervanadat: Cu4V2.15O 9.38 / About Cu4V2,15O9.38
Authors: Christian H.-P. , Müller-Buschbaum Hk.
Published: March 2015

Single crystals of Cu4V2.15O9,38 were prepared by hydrothermal synthesis. The composition was confirmed by analysis and crystal structure investigation. Cu4V2.15O9,38 has an orthorhombic unit cell : a = 15.021, b = 8.564 and c = 6.055 Å, space group D2
4P 212121. The structure consists of a network made up of chains of edge-shared Cu-O6 octahedra. The chains are linked by Cu-O6 octahedra building up a wave-like layer parallel to the b/c plane. The layers are linked to each other by V—O4 tetrahedra and two sorts of trigonal bipyramids one of them containing copper. The center of the other one is statistically filled with vanadium.
Das System Arsen-Tellur. Dichten und elektrische Leitfähigkeiten der Schmelzen, Phasendiagramm / The System Arsenic-Tellurium. Density and Electrical Conductivity of the Melts, Phase Diagram
Authors: Blachnik Roger , Jäger Anja , Enninga Gerhard
Published: March 2015

The phase diagram of the system As—Te has been determined. The density and the electrical conductivity of the melts were measured as a function of temperature and concentration. The density increases with increasing temperature. The electrical conductivity has a minimum near 40 mol% As. This minimum becomes less pronounced with increasing temperature. Both observations indicate, that polymeric units exist in these melts, which are destroyed at higher temperature.
Die Schwingungsspektren von μ-Οxο- und μ-Nitridokomplexen des Rutheniums and Rheniums / Vibrational Spectra of μ-Oxo and µ-Nitrido Complexes of Ruthenium and Rhenium
Authors: Mattes Rainer , Moumen Mohamed , Pernoll Ingeborg
Published: March 2015

The infrared and Raman spectra of potassium and tetramethylammonium salts of the dinuclear anions M2OX10
4- and M2NX8(H2O)2
3-, with M=Ru, Re and X=Cl, Br, have been registered and assigned on the basis of a normal coordinate analysis. The totally symmetric vibrations νsΜ2Ο (νsM2N), νsMXa,x(νsM—OH2) and δsOMX (δsNMX) show considerable mixing. The force constants of the bridge bonds are 3.9 mdyn/Å for the μ-oxo-and 5.1 mdyn/Å for the μ-nitrido-compounds, the respective stretch-stretch interaction constants 0.45 and 0.6 mdyn/Å.
Notizen: Ein neues Schwefel-Stickstoff-Ringsystem: 3.5-Difluoro-1.1.3.5-tetraoxo-2-N-alkyl-1.3.5.2.4.6-trithiatriazin (1.3.5-SVI) / A New Sulfur-Nitrogen-Ringsystem: 3,5-Difluoro-1,1,3,5-tetraoxo-2-N-alkyl-1,3,5,2,4,6-trithiatriazene (1,3,5-SVI)
Authors: Wagner Diec-Lang , Wagner Hartmut , Glemser Oskar
Published: March 2015

By reaction of silver-3,5-difluoro-1,1,3,5-tetraoxo-1,3,5,2,4,6-trithiatriazene(1,3,5-SVI) with alkyljodids a new inorganic ring-system is formed, containing two sulfanuric-fluoridegroups and one alkylsulphimide-group. The structures are proofed by NMR and other structure-isomeres can be excluded.
Neue Verfahren zur Darstellung von Chromaten und Polychromaten / New Methods for the Preparation of Chromates and Polychromates
Authors: Behr Werner J. , Fuchs Joachim
Published: March 2015

Chromates and polychromates with organic cations can be obtained by careful hydrolysis of mono-, di- or trichromate esters in the presence of organic bases. Mixtures of nitrobenzene and carbon tetrachloride are used as solvents. When nitrobenzene soluble chromates are reacted with chromate esters more condensed anions such as tri- and tetrachromates are formed. As tetra-n-butylammoniumsalt [(C4H9)4N]2Cr3O10 for the first time a trichromate was obtained that can be recrystallized undecomposed from water.
Phosphoryl- und Thiophosphoryl-schwefeloxiddifluoridimide / Phosphoryl- and Thiophosphoryl-sulfuroxidedifluorideimides
Authors: Feser Manfred , Höfer Rainer , Glemser Oskar
Published: March 2015

The phosphorylhalides OPF2Cl, OPFCl2 and OPCl3 react with Ag+NS(O)F2- (1) to yield the phosphorylsulfuroxidedifluorideimides (2)—(7). Reaction of SPCl3 and 1 yields the thiophosphorylhalides SPCl3-n(NSOF2)n, and by decomposition of 11 SPF(NSOF2)2 is formed. The IR, mass, 1H, 19F and 31P NMR spectra of the above mentioned compounds are reported.
1H-NMR- und IR-spektroskopische Untersuchungen zur Konformation von Hydroxymethyl-Substituenten in 2.3-Stellung an Hexachlorbicycloheptenen / 1H NMR- and IR-Spectroscopic Conformational Studies on Hydroxymethyl Substituents in the 2,3 Positions of Hexachlorobicycloheptenes
Authors: Singer Hellmut , Schuphan Ingolf , Ballschmiter Karlheinz
Published: March 2015

Hexachloro-bicycloheptenes and heptadienes with hydroxymethyl-substituents in the 2 and 3 position show non-equivalence of the methylene protons in their NMR spectra. This is caused both by hindered rotation and the asymmetry of the molecules. For some molecules the spectroscopic data allow conclusions to be made concerning the conformation of the substituents.
Metallkomplexe mit Tetrapyrrol-Liganden, XIV.
Authors: Buchler Johann W. , Lam Lay K.
Published: March 2015

An air-stable porphodimethene, namely α, γ-dimethyl-α, γ-dihydrooctaethylporphyrin [H2(OÄPMe2)*; (1)] is metalated with Fe(CO)5/I2 in toluene to yield an air-stable binuclear iron(III) porphodimethene, μ-oxobis(α, γ-dimethyl-α, γ-dihydrooctaethylporphinato)iron-(III) [(OÄPMe2)FeOFe(OÄPMe2); (2a)] after chromatography and crystallization. 2a is transformed into the mononuclear hemins Fe(OÄPMe2)X [X = OMe, OPh, OAc, Cl (2 b-2 e)] and into a nitrosyl heme Fe(OÄPMe2)NO (2f). Other hemes are identified in solution. The compounds are characterized by elemental analyses, electronic-, IR, and mass spectra. IR data and magnetic moments as measured in solution by the Evans method allow a distinction between the mononuclear and binuclear species. While the FeII porphodimethenes (hemes) show only one strong absorption in the visible region λ≈460 nm; like Zn(OÄPMe2), the FeIII species (hemins) have three characteristic strong bands (λ≈ 400, 450, and 540 nm for the μ-oxo species).
Notizen: Einkristall-Strukturdaten einiger Fluoride und Cyanide A2
IBIMIIIX6 der Elpasolithfamilie / Single Crystal Structural Data of Some Fluorides and Cyanides A2
IBIMIIIX6 of the Elpasolite Family
Authors: Haegele R. , Verscharen W. , Babel D.
Published: March 2015

The parameters of complete X-ray structure determinations are given for the fluorides

Rb2NaFeF6 and Rb2KFeF6 (cubic), Cs2NaCrF6 and Cs2NaFeF6 (hexagonal-rhom-bohedral) and Cs2LiGaF6 (hexagonal). Space group and lattice constants of the monoclinic cyanides Cs2BFe(CN)6 (B = Na, K, Rb) are reported as well.
Die reversible Dimerisierung von o-Phenylendioxydimethylsilan als Modell für die Oligomerisierung ringgespannter Kieselsäureester / The Reversible Dimerisation of o-Phenylenedioxydimethylsilane – an Example for the Oligomerisation Reactions of Ring-strained Organosiliconates
Authors: Meyer Heinrich , Nagorsen Günter , Weiss Armin
Published: March 2015

The dimerisation equilibrium of o-phenylenedioxydimethylsilane (2,2-dimethyl-1,3,2-benzodioxasilole) has been established and studied by 1H NMR spectroscopy. Equilibrium constants between 36 and 130°C have been determined. The enthalpy of dimerisation (about 5 kcal/mole) was obtained from these data and was attributed mainly to ring strain in the five membered dioxasilole ring. A mechanism for the reaction has been proposed.
Über den Mechanismus und die Kinetik der Methan- und Ammoniakzersetzung im kalten Plasma / The Mechanism and Kinetics of Methane and Ammonia Decomposition in Cold Plasma
Authors: Simionescu Cr. , Dumitriu S. , Bulacovschi V. , Onac D.
Published: March 2015

We have investigated the kinetics of methane-ammonia mixture decomposition in a cold plasma. Among the products of methane decomposition H2, C2H6, C2H4 and C2H2 were identified. Their ratio was dependent on time and discharge of the used power in the experiments. When the ammonia was used as medium, there were identified only H2 and hydrazine as reaction products. For the CH4-NH3 mixture among the decomposition gases we could find hydrogen cyanide, ethylamine, methylamine and other aliphatic amines.
Darstellung und spektroskopische Eigenschaften von planaren Dipseudohalogeno-bis(phosphin)-platin(II)-Komplexen / Preparation and Spectroscopic Properties of Planar Dipseudohalogeno-bis(phosphine)-platinum(II) Complexes
Authors: Kreutzer Peter H. , Schorpp Karl T. , Beck Wolfgang
Published: March 2015

The preparation and properties of cis-diazido platinum complexes (R3P)2Pt(N3)2 are described. The dipole moments, the IR, 31P- and 14N NMR spectra and the data of analogous cis and trans pseudohalogeno-bis(phosphine) compounds (R2P)2Pt(X)Y (X = N3, NCO, NCS; Y = N3, NCO, NCS, H, CN) are reported.
Fünfringheterocyclen aus Aza-hexa-1.3.5-trienen über 1.3-dipolare Zwischenstufen, I /Five-membered Heterocycles from Aza-hexa-1,3,5-trienes via 1,3-Dipolar Intermediates, I
Authors: Burger Klaus , Schickaneder Helmut , Meffert Alfred
Published: March 2015

The synthesis of 3-diethylamino-1,4-bis(1,1,1,3,3,3-hexafluoroisopropyl)-pyrazole from hexafluoroacetone azine and 1-diethylamino-propine via an azomethinimine intermediate is described.
Die Kristallstruktur von Lu2S3 / The Crystal Structure of Lu2S3
Authors: Range Klaus-Jürgen , Leeb Richard
Published: March 2015

The corundum-type structure of Lu2S3 was confirmed and refined from single-crystal data.
Notizen: Cyclopropenonchemie, VIII Über die Lösungsmittelabhängigkeit der Reaktion zwischen Diphenylcyclopropenon und Pentamethylendiaziridin / Cyclopropenone Chemistry, VIII On the Solvent Dependence of the Conversion Between Diphenylcyclopropenone and Pentamethylenediaziridine
Authors: Dehmlow Eckehard V. , Schönefeld Joachim
Published: March 2015

The title compounds yield 10 in aprotic media whereas 8 and 9 are formed in methanol. Diphenylcyclopropenon and an oxaziridine give tolane and β-amino-α-phenylcinnamic acid.
Schiff Base Complexes of Dioxouranium(VI), II Dioxouranium(VI) Complexes of the Schiff Bases of o-Hydroxy Acetophenone, 2,4-Pentandione and Salicylaldehyde
Authors: Vijay R. G. , Tandon J. P.
Published: March 2015

Dioxouranium(VI) derivatives of the type UO2(NO3)2(SBH2)2 have been synthesised by the reactions of dioxouranium(VI) nitrate hexahydrate with the nitrogen donor ligands (SBH2) in 1: 2 molar ratio. The Schiff bases used in these reactions are of the general type, o-HOC6H4C(CH3): NX1OH (where X1 = -CH2CH2-, -CH2CH(CH3)- and -CH2CH2CH2-), CH3C(OH)CHC(CH3): NX2OH and o-OHC6H4CH: NX2OH (where X2 = -CH2CH2-, -CH2CH(CH3)-, -CH2CH2CH2- and o-C6H4). The resulting new derivatives have been characterized on the basis of elemental analysis, magnetic susceptibility, conductance measurements and infrared spectra
Untersuchungen über die Wechselwirkung von Aromaten mit Antimontrichlorid, IV Elektronenspektroskopische Untersuchung zur Frage der Farbigkeit der Molekülverbindung ArH • 2 SbCl3 / Investigations about the Interaction of Aromatic Compounds with Antimonytrichloride, IV Elektronspectroscopical Investigation about the Colour of the Aromatics • 2 SbCl3 Complexes
Authors: Perkampus H.-H. , Schönberger E.
Published: March 2015

Contrary to the published results it is shown the colour of the solid molecular complexes arene • 2 SbCl3 is due to impurities in these systems. These impurities are mainly the radical ions of the aromatic compounds. If the formation of these radical ions is avoided the complexes in the solid state are colourless or slightly yellow-coloured
Über die Umsetzung von Diphenylchlorphosphin mit Perfluoralkylcarbonsäuren.
Authors: Sartori Peter , Heinz Hochleitner Rudolf , Hägele Gerhard
Published: March 2015

Reaction of (C6H5)2 PCl with CF3COOH yields diphenylphosphinic acid 1-diphenylphosphoryl-2,2,2-trifluoroethylester (1a) as a final product. 1a can be hydrolized leading to (1-hydroxy-2,2,2-trifluoroethyl)-diphenylphosphine oxide (3a). The analogous reaction of (C6H5)2PCl with C2F5COOH gives diphenylphosphinic acid -1-diphenylphosphoryl-2,2,3,3,3-pentafluoropropylester (1b).

Compounds 1a, 1b and 3a were identified by high resolution nuclear magnetic double resonance and 31P-Fourier transform spectroscopy
Notizen Über die Reaktionen metallierter Cyclothioalkane und n-Thioalkane mit Kohlendioxid, Schwefeldioxid und Schwefelkohlenstoff / The Reactions of Metallated Cyclothioalkanes and Thioalkanes with Carbon Dioxide, Sulfur Dioxide and Carbon Disulfide
Authors: Schmidt Max , Weissflog Eckhard
Published: March 2015

The lithium salts of thioalkyl- and cyclothioalkylsubstituted Carboxylic acids, sulfinic acids and dithiocarboxylic acids are prepared by treatment of the monometallated s-trithiane, tetrathiocane, pentathiecane, 2,4- dithiapentane and trithioacetaldehyde with carbon dioxide, sulfur dioxide and carbon disulfide