bluuebunny/crossref_metadata_2025_split huggingface dataset:
Massenspektrometrische Untersuchungen an einigen Hexahydrotriazinen
Authors: Schumacher Ernst , Taubenest Richard 
Published: December 2004

AbstractMass spectra of some hexahydrotriazines have been investigated and mechanistic interpretations of the production of the principal ions formed und erelectron impact are given, using high resolution. A new technique for sample introduction is described, suitable for introducing low boiling liquids sensitive to decomposition into the ion source via a direct inlet system.
Die Biosynthese der Cardenolid‐ und Spirostan‐Glykoside in Digitalis lanata EHRH. Vergleich der Bildungsraten Glykoside und Aglykone, 274. Mitteilung
Authors: v. Euw J. , Reichstein T. 
Published: December 2004

AbstractYoung plants of Digitalis lanata were fed by the vick technique with ammonium mevalonate‐[3‐14C]. The isolation from the leaves of pure digitoxigenin and gitoxigenin (without dilution) was described formerly [5]. We describe here the isolation from the same plants of the four pure spirostanols: tigogenin (5), digalogenin (6), gitogenin (7) and digitogenin (8), again without dilution. These spirostanols contained about 3–5 times more radioactivity per Mol than the cardenolides.
Über 9β, 10α‐Steroide. 2. Mitteilung. Strukturaufklärung von mikrobiologischen Umsetzungsprodukten mit Sauerstoff‐Funktion in Stellung 11
Authors: Saucy G. , Els H. , Miksch F. , Fürst A. 
Published: December 2004

AbstractThe structure and stereochemistry of some 11α‐ and 11β‐hydroxy‐9β, 10α(retro)‐steroids of the androstane, pregnane and corticoid series, obtained microbiologically, has been elucidated.
Die Struktur des Harpagosids. 2. Mitteilung über Iridoide
Authors: Lichti H. , von Wartburg A. 
Published: December 2004

AbstractThe structure and configuration of harpagoside, a bitter principle from the roots of Harpagophytum procumbens DC, have been elucidated by degradation reactions and NMR. spectra. The hitherto uncertain position of a secondary hydroxyl group could be assigned to C‐6 of the aglycone moiety. As earlier postulated, harpagoside (1) as well as its saponification product, harpagide (12), belong to a series of natural enol ethers known as iridoids.
Die Glykoside der Samen von Dregea volubilis (L.) BENTH. ex HOOK. 2. Mitt. Isolierung weiterer Drevogenine Glykoside und Aglykone, 277. Mitteilung
Authors: Sauer H. H. , Weiss Ek. , Reichstein T. 
Published: December 2004

AbstractA total of fifteen substances were identified through thin‐layer chromatography, after mild acid hydrolysis of the chloroform extract from the seeds of Dregea volubilis (L.) BENTH. ex HOOK. Of these fifteen substances, eight (B, D, P, O; U, V, H and T) were isolated in crystalline form. Two of these were identical with the known genins drevogenin B (B) and drevogenin D (D). Drevogenin P (P) and the unknown substance O (probably a genin) were isolated for the first time. U proved to be identical with D‐cymarose, V with the biose U1 obtained from Asclepias lilacina, and H with (+)‐methyl‐pachybioside. T was not investigated (probably a sugar derivative).
Die Struktur der Drevogenine. 3. Mitteilung Struktur von Drevogenin A, B und D. Glykoside und Aglykone, 279. Mitteilung
Authors: Sauer H. H. , Weiss Ek. , Reichstein T. 
Published: December 2004

AbstractThe treatment of drevogenin P with isovaleryl chloride in pyridine gave an amorphous 3,12‐di‐O‐isovaleryl‐drevogenin P (4), which, on energetic acetylation, was converted into 3‐O‐isovaleryl‐drevogenin A (5). This could be isolated in crystalline form and was converted through mild alkaline hydrolysis into drevogenin A. Hence drevogenin A could be classified as 11‐O‐acetyl‐12‐O‐isovaleryl‐drevogenin P. Indirectly, the structure of drevogenin B could be deduced to be most probably that of 11α‐mono‐O‐acetyl‐drevogenin P. Some details of the earlier given structures [1] are corrected here. Drevogenin D has an 11α‐hydroxyl group.
Alloglaucotoxigenin, Strukturbestimmung Glykoside und Aglykone, 280. Mitteilung
Authors: Brandt R. , Stöcklin W. , Reichstein T. 
Published: December 2004

AbstractThe structure of alloglaucotoxigenin is shown to be that of 3β, 14β, 15β‐trihydroxy‐19‐oxo‐5α‐carda‐20:22‐enolide (IV) in the following way: The 19‐oxo group could be eliminated by reduction of the corresponding mercaptal. The structure of the resulting 3β, 14β, 15β‐trihydroxy‐5α‐carda‐20:22‐enolide, obtained in the acetylated form, was established through degradation and through partial synthesis by treatment of Δ14‐anhydro‐uzarigenin (XIII) with osmium tetroxide. The isomeric 3β,14α, 15α‐trihydroxy‐cardenolide was also formed in large quantities. The substance XI showed in its optical rotatory dispersion curve a positive, and substance XIV a negative COTTON effect.
Über die Herkunft der C‐Atome 22 und 23 im Strychnin. (Vorläufige Mitteilung)
Authors: Schlatter Ch. , Waldner E. E. , Schmid H. , Gröger D. , Stolle K. , Mothes K. 
Published: December 2004

AbstractThe results of 1‐[14C]‐sodium acetate feeding experiments with Strychnos nux vomica L. have shown that the C‐atoms 22 and 23 of strychnine are very probably acetate derived.
Sur 1'o‐chlorobenzylidène‐9‐fluorène
Authors: Hammer Wolfgang , Stauner Thomas , Chardonnens Louis 
Published: December 2004

Abstract9‐o‐Chlorobenzylidenefluorene is obtained in good yield from fluorene and o‐chlorobenzaldehyde by condensation in methanol in the presence of sodium methoxide, while in ethanol containing sodium ethoxide 9‐o‐chlorocinnamylidenefluorene is formed as a by‐product. The latter is absent in the methanol condensation system.
Weitere Evidenz für die mikroskopische Gleichzeitigkeit des Bruches zweier Bindungen bei einer E2‐Reaktion: H‐Isotopeneffekte und Substituentenwirkungen bei der Reaktion von 2,2‐Diphenyläthyl‐benzolsulfonat mit Methoxid‐Ion
Authors: Willi A. V. 
Published: December 2004

AbstractSecond order rate constants are determined for the E2 reactions of 2,2‐diphenyl‐ethyl benzenesulfonates Ph2CxHCH2O · O2S–C6H4–X with CH3ONa in methyl cellosolve solution (xH = H or D, X = p‐CH3O, p‐CH3, H or p‐NO2). The HAMMETT ∂ values are of the same order of magnitude as those found in the first order solvolyses of methyl, ethyl or isopropyl benzenesulfonates. The primary deuterium isotope effects kH/kD are 5.27, 5.42 and 6.70 for X = p‐CH3O, H and p‐NO2. The ∂ values as well as the increase of kH/kD with introduction of p‐NO2 supply evidence for simultaneous CαO and CβH bond cleavages also in the E2 reactions of these compounds.
Die Redox‐Eigenschaften von Hydroxyanthrachinonsulfonsäuren II
Authors: Broadbent A. D. , Zollinger Hch. 
Published: December 2004

AbstractThe formation of intermediates in the reduction of two hydroxyanthraquinonesulphonic acids has been investigated by potentiometric and polarographic techniques. Acid‐base properties of molecules in the redox sequences have been deduced. In certain pH regions measurements were hindered by specific physical and chemical side‐reactions. Reduction in strongly alkaline solution only produces semiquinone free radical intermediates, but below pH 10 bimolecular quinhydrones may also be formed.
Die Reaktion von wässerigem Epichlorhydrin mit Hydroxid‐ und Phenolat‐Ionen
Authors: Konecny Jan 
Published: December 2004

AbstractThe reactions of epichlorhydrin with hydroxide and phenolate ions in water are shown to proceed by the same mechanism as the reactions of other epoxides with nucleophilic reagents, and not by direct attack on the halogen‐substituted carbon. The effect of solvent composition on the linear free energy correlations, like the equation of SWAIN & SCOTT, is discussed on the basis of recent literature data.
Schmelzreaktionen mit Aluminiumchlorid. I. Mitteilung. Über Kondensationsreaktionen von 1‐Aminoanthrachinon und 1 ‐Amino‐anthrachinon‐2‐sulfonsäure in der Pyridin‐Aluminiumchlorid‐Schmelze
Authors: Wick A. K. 
Published: December 2004

AbstractThe condensation of 1‐aminoanthraquinone to 1,1′‐diamino‐2,2′‐dianthraquinonyl in a melt of anhydrous aluminium chloride and moist pyridine has been reinvestigated. By a similar procedure under anhydrous conditions the sodium salt of 1‐aminoanthraquinone‐2‐sulfonic acid yielded the sodium salt of 4,4′‐diamino‐1,1′‐dianthraquinonyl‐3,3′‐disulfonic acid.
Über Struktur und Aktivität der den H2O2‐Zerfall katalysierenden Cu2+‐Komplexe. V. Vergleich der katalytischen Aktivität der Cu2+‐Komplexe isomerer β‐Hydroxythiophen‐Derivate. Mettallionen und H2O2, 9. Mitteilung
Authors: Petri S. , Sigel H. , Erlenmeyer H. 
Published: December 2004

AbstractThe catalytic properties in H2O2 decomposition of the Cu2+‐chelates of 2‐ Acetyl‐3‐hydroxy‐thiophene (I) and 3‐Acetyl‐4‐hydroxy‐thiophene (II) have been investigated. Evidence is given that the catalytic activity of the chelates is a function of the respective bond orders of the α, β (I) and β, β′ (II) thiophene bonds of the chelate ring.
Furyl‐ und Thienyl‐benzochinone, eine Gruppe neuer Farbstoffe
Authors: Baumann N. , Fumagalli S. , Weisgerber G. , Eugster C. H. 
Published: December 2004

AbstractEs wird gezeigt, dass sich Furan, Thiophen und deren Alkylhomologe an negativ substituierte Chinone (Acetyl‐p‐benzochinon, Carbomethoxy‐p‐benzochinon, Cyano‐p‐benzochinon), Alkylbenzochinone sowie an Benzochinon in säurekatalysierter Reaktion addieren.
Synthèses dans ka série des bis‐indéno‐fluorènes II. Le dihydro‐10,15‐5H‐bis‐indéno [1, 2‐a;2′,1′‐i] fluorène
Authors: Chardonnens Louis , Hammer Wolfgang 
Published: December 2004

AbstractThe biangular bis‐indeno‐fluorene 10,15‐dihydro‐5H‐diindeno [l, 2‐a; 2′, 1′‐i]‐fluorene (XII) has been synthesised in 6 steps starting from 1‐(o‐carboxyphenyl)‐fluorenone (overall yield 21%). As an intermediate the 5,10,15‐trioxoderivative of XII and, accessorily, its 5,10‐dioxoderivative were also obtained.
Multiple Formen der Aldolase in Organextrakten der Ratte. Ü Aldolasen, 8. Mitteilung
Authors: Christen Ph. , Rensing U. , Schmid A. , Leuthardt F. 
Published: December 2004

AbstractThe aldolase activities of crude rat tissue extracts were separated by starch gel electrophoresis. Aldolase was located on the gel by a specific staining method. Nine bands of different electrophoretic mobility were stainable by this technique. Organ specific isoenzyme patterns could be demonstrated.
Etude des composés d'addition des acides de LEWIS XXVII. Composés d'addition de la cyclohexanedione‐1, 4 avec HgCl2, ZnCl2, et TiCl4
Authors: Rossetti G.‐P. , Susz B.‐P. 
Published: December 2004

AbstractThe adducts of cyclohexane‐1,4‐dione with HgCl2, ZnCl2, and TiCl4 have been prepared, and the IR. absorption spectra of the solid products studied. The lowering of the carbonyl frequency shows that the acceptor is linked by dative bonds to the carbonyl oxygen donors. This result confirms the cyclohexane‐1,4‐dione · HgCl2 structure which has been determined by X rays diffraction.
Note sur la préparation du monoester (triméthylammonio‐4‐butyl)‐sulfurique
Authors: Cherbuliez Emile , Jaccard S. , Mouzenidou R. , Rabinowitz J. 
Published: December 2004

Abstract4‐Trimethylammoniobutyl hydrogensulfate, heated at 185°C under reduced pressure, yields 4‐trimethylammoniobutylsulfuric monoester. The rate of scission of this ester in alkaline medium grows with the concentration of the OH− ions.
Schwefel als Ligandatom in aromatischen Verbindungen III. Synthese einer Isothiazol‐Carbonsäure
Authors: Béringer Monique , Prijs B. , Erlenmeyer H. 
Published: December 2004

AbstractIn order to study the properties of aromatic sulfur as ligand atom and at the same time the similarity of the quinoline and the isothiazole ring, 3‐phenylisothiazole‐5‐carboxylic acid was synthetisized in different ways, e.g. using the 3‐phenylisothiazole—also unknown up to date—as starting compound.
Die Konstitution von Roridin. A Verrucarine und Roridine, 11. Mitteilung
Authors: Böhner B. , Tamm Ch. 
Published: December 2004

AbstractThe antibiotic roridin A (C29H40O9) yields on base catalysed hydrolysis verrucarol (10) and roridinic acid (13) (C14H22O7), a hitherto unknown dicarboxylic acid whose structure was proved by degradation. In roridin A 10 and 13 are united to form a macrocyclic diester to which structure 1 is assigned.
Die zerstörungsfreie, aktivierungsanalytische Bestimmung von Hauptbestandteilen in grösseren Probestücken (Anwendungsbeispiel: Münzen)
Authors: Wyttenbach A. 
Published: December 2004

AbstractEs wird eine aktivierungsanalytische Methode zur zerstörungsfreien Bestimmung des Gehaltes an Silber, Kupfer und Gold von Münzen beschrieben. Wichtige Merkmale der Methode sind die Benutzung einer sich drehenden Bestrahlungseinrichtung, die Verwendung von Standards, welche den Proben hinsichtlich Form und Zusammensetzung möglichst entsprechen, und die Korrektur der gemessenen spezifischen Aktivitäten für Variationen im Ag‐Gehalt und in der Dicke der gemessenen Münzen. Die Methode wurde auf 370 Silbermünzen aus dem 15. und 16. Jahrhundert angewendet; der relative Fehler einer Einzelmessung an diesen Proben betrug ± 1,7%.
Isolierung von 2′‐Dehydroverrucarin A als Metabolit von Myrothecium roridum TODEex Fr., Gattungstyp bei FRIES. Verrucarine und Roridine. 13. Mitteilung
Authors: Zürcher W. , Tamm Ch. 
Published: December 2004

AbstractFrom cultures of Myrothecium roridum TODE ex FRIES 2′‐dehydroverrucarin (1) was isolated. 1 is a genuin metabolite of the micro‐organism.
Untersuchungen über das Verhalten organischer Mischphasen. 4. Mitteilung. Dampfdrücke, thermodynamische Mischungsfunktionen und Brechungsindizes der binären Systeme Tetrahydrofuran‐Diäthyläther und Methanol‐Tetrahydrofuran bei 25°
Authors: Arm H. , Bánkay D. , Schaller R. , Wälti M. 
Published: December 2004

AbstractThe total vapor pressure and the heats of mixing of the system tetrahydrofurane‐diethyl ether, and methanol‐tetrahydrofurane were measured at 25°C. The index of refraction was used to determine concentrations for the total pressure measurements. The partial pressures, activity coefficients, excess free energies, and entropy functions were calculated.
Recherches sur la formation et la transformation des esters LXXI Sur la préparation des acides ω‐(phénylthiocarbamylamino)‐alcoylphosphoriques et sur leur scission à divers pH
Authors: Cherbuliez Emile , Baehler Br. , Espejo O. , Frankenfeld E. , Rabinowitz J. 
Published: December 2004

AbstractSodium ω‐phenylthiocarbamylaminoalkyl phosphates C6H5NHCSNH–(CH2)n–OPO3Na2 have been obtained by reacting phenylisothiocyanate with the corresponding aminoalkyl phosphoric monoester in the presence of 2 eq. of NaOH.
Photochemische Reaktionen. 40. Mitteilung. O‐Acetyl‐6,7‐methylen‐ und O‐Acetyl‐1‐dehydro‐6,7‐methylentestosterone: Stereochemie und Resultate der UV.‐Bestrahlung
Authors: Pfister J. , Wehrli H. , Schaffner K. 
Published: December 2004

AbstractThe stereochemistry of the isomeric 6, 7‐methylene steroids 2 and 3 was established by reduction to the known 7‐methyl compounds 6 and 8, respectively. These results revise previous steric assignments based on n.m.r. data [4].
Die Cardenolide der Samen von Strophanthus gratus (Wall. et Hook.) Franch. 2. Mitteilung. Glykoside und Aglykone, 284. Mitteilung
Authors: Geiger U. P. , Weiss Ek. , Teichstein T. 
Published: December 2004

AbstractExtracts from the seeds of Strophanthus gratus showed the presence of 30 cardenolides after being subjected mainly to techniques of preparative separation and partly through acetylation of these concentrates. These 30 cardenolides have been differentiated from one another by paper chromatography in five solvent systems. Among the identified cardenolides were most of the compounds isolated earlier by Jäger et al. [1]. In accordance with the results of these authors, ouabain (ca. 7%) was by far the predominant constituent, followed by acolongifloroside K (ca. 0.4%) and strogoside (0.4%). These three compounds have been isolated in crystalline form. Strogoside (structure elucidation see following paper) is a new name for the compound K described by JÄGER et al. Of the compounds present in trace amounts, only sarmentoside E was isolated in crystalline form directly, and the new compound λ after acetylation, which yielded O‐acetyl‐λ. The compound λ seems to be a dilactone with a structure similar to that of strogoside but containing rhamnose as the sugar and an aglycone probably different from strogogenin.
Strogosid, Strukturbestimmung. Glykoside und Aglykone, 285. Mitteilung
Authors: Geiger U. P. , Weiss Ek. , Reichstein T. 
Published: December 2004

AbstractStrogoside (from Strophanthus gratus (Wall. et Hook.) FRANCH.) is shown to be the 6‐deoxy‐L‐talopyranoside of 1β, 3β, 5β, 11α, 14β‐pentahydroxy‐19‐acid‐carda‐20:22‐en‐(19→11), (23→21)‐diolide (= acolongifloroside K‐19‐acid‐(19→11)‐lactone) 12 in two ways:

3, 11‐Di‐O‐acetylouabagenin 3 was selectively oxydized in the 19‐position. The crystalline acid 5 obtained was transformed into the crystalline 1, 3, 11‐tri‐O‐acetylouabagenin‐19‐acid‐methylester 11. The latter was also obtained‐although in poor yield‐from strogoside by mild alcaline hydrolysis of the (19→11)‐lactone ring, followed by methylation, acid hydrolysis, and acetylation.
Degradation of Di‐O‐acetylstrogogenin 18 yielded the etianic ester 16, which was also obtained from the ester 11 by degradation to its etianic acid, followed by complete saponification, methylation, and acetylation.
The sugar was isolated in crystals and shown to be 6‐deoxy‐L‐talose.
Zur Kenntnis der metastabilen Übergänge in Massenspektren organischer Verbindungen
Authors: Seibl J. 
Published: December 2004

AbstractObservations in the mass spectra of several organic compounds indicate that metastable ions do not constitute conclusive evidence for one‐step decomposition processes or elimination of structural entities. Contrary to accepted views it appears that metastable ions may arise from two‐step or possibly even from multi‐step fragmentation reactions.
19‐nor‐Steroide V. Neue Synthese von 6‐Dehydro‐19‐nor‐Steroiden. Über Steroide, 208. Mitteilung
Authors: Kalvoda J. , Anner G. 
Published: December 2004

AbstractA new efficient approach to the synthesis of Δ4,6‐3‐oxo‐19‐norsteroids is described. Starting from 3β, 17α‐diacyloxy‐20‐oxo‐Δ5‐pregnenes, the derivatives VIIIa and VIIIb of 6‐dehydro‐19‐norprogesterone have been synthesized, which exhibit high progestational activity. Modification of the procedure leads to the new group of steroidal Δ5(10),6‐dienes.
Etude des composés d'addition des acides de LEWIS XXIX. Composés d'addition entre acides aromatiques et SbCl5, AlCl3, TiCl4, SnCl4 ou ZnCl2
Authors: Petitpierre B. , Susz B. P. 
Published: December 2004

AbstractThe adducts of benzoic, p‐toluic, mesitoic and cinnamic acids with SbCl5, AlCl3, TiCl4, SnCl4 and ZnCl2 have been prepared, and the IR. absorption spectra of the compounds, in the solid state or in solution in CCl4, studied. The lowering of the carbonyl frequency shows that the acceptor is linked by a dative bond to the carbonyl oxygen atom acting as donor. A calculation, by the Wilson GF method, of force constants and their contributions in potential energy of vibration for monomeric benzoïc acid and its adduct with TiCl4 confirmed that the carbonyl stretching force constant, and therefore the CO bond order, is lowered by the formation of the adducts.
Die Cardenolide der Samen von Mansonia altissima A. CHEV. 2. Mitteilung Die Struktur von Mansonin und Strophothevosid Glykoside und Aglykone, 287. Mitteilung
Authors: Allgeier H. , Weiss Ek. , Reichstein T. 
Published: December 2004

AbstractMansonin is the 2,3‐di‐O‐methyl‐6‐deoxy‐β‐D‐glucopyranoside of strophanthidin, and strophothevoside the corresponding 3‐O‐methyl‐6‐deoxy‐β‐D‐glucopyranoside.
Gymnemagenin, vermutliche struktur Glykoside und Aglykone, 289. Mitteilung
Authors: Stöcklin W. 
Published: December 2004

AbstractGymnemagenin, the aglycone obtained from gymnemic acid by fermentative degradation and alkaline hydrolysis, is probably a new hexahydroxy‐triterpene. The proposed structures are derived mainly from data obtained by physical methods. Gymnemagenin is probably a 3β,15α(or 16β), 21β,22α,23,28‐ or 3β,15α,16β,21β(or 22α), 23,28‐hexahydroxy‐olean‐12‐ene. Further experimental information is necessary for decision concerning the correct structure.
Über Papaver bracteatum LINDL. IV. Mitteilung Zur Struktur des Alkaloids E
Authors: Guggisberg A. , Hesse M. , Schmid H. , Böhm H. , Rönsch H. , Mothes K. 
Published: December 2004

AbstractFrom Papaver bracteatum LINDL. «Halle III» a new alkaloid representing the rhoeadine type has been isolated, the structure of which was elucidated by means of high resolution mass spectrometry and NMR. spectroscopy mainly.
Synthese von Exalton und racemischem Muscon aus Cyclododecanon Vorläufige Mitteilung
Authors: Ohloff G. , Becker J. , Schulte‐Elte K. H. 
Published: December 2004

AbstractNew lines for the preparation of cyclopentadecanone (exaltone) and racemic muscon starting from cyclododecanone via bicyclic intermediate steps are described.
Das ESR.‐Spektrum der 1,2,3‐Trihydropyrenyls
Authors: Gerson F. , Heilbronner E. , Reddoch H. A. , Paskovich D. H. , Das N. C. 
Published: December 2004

AbstractThe two isomeric tetrahydropyrenes II and III have been prepared by Birch reduction of pyrene. Air oxidation of either compound yields 1,2,3‐trihydropyrenyl (1,9‐trimethylene‐phenalenyl; IV); its ESR. hyperfine structure is shown to be closely related to that of phenalenyl.
Les spectres de masse dans l' analyse 10e communication [1] les transferts d'hygrogène dans des cétones norbornyliques
Authors: Thomas Aaln F. , Waillhalm B. 
Published: December 2004

AbstractSome simple rules for predicting the transfer of endo hydrogens in the mass spectra of norbornane carbonyl derivatives are proposed. Transfers from C‐6 to C‐2 generally occur, but are repressed if a methyl group is on C‐1. Transfers from C‐5 to C‐2 can occur, but are less favorable than 1‐3 transfers. Endo‐2‐acetylnorbornanes undergo a γ‐hydrogen transfer from C‐5 with ring fission.
Untersuchung reversibler Photoprozesse durch Blitzlichtphotolyse IV. Triplettzustände des 1, 3, 6′, 8′‐ tetramethyl‐dehydrodianthrons
Authors: Huber J. R. , Wild U. , Günthard Hs. H. 
Published: December 2004

AbstractBy means of the flash photolysis technique, transient absorption spectra attributed to tetramethyl‐dehydrodianthrone (TMD) in both the photochromic and triplet states have been investigated in polymethylmethacrylate matrices and in the solvent triacetin. In polymethylmethacrylate matrices and in rigid glasses of triacetin the triplet state of TMD is heavily populated. Triplet‐triplet absorption and phosphorescence measurements show that below 180°K the triplet decay follows first order kinetics with the decay constant k=11,3 ± 0,1 s−1. In incompletely solidified triacetin glass it is possible to monitor the transient absorption of the photochromic and the triplet state simultaneously. It is shown that the photochromic state 1A1* is not generated via the triplet state. Therefore the authors suggest a kinetic scheme characterised by a direct singlet state ‐ photochromic state transition.
Über die gas‐chromatographische Bestimmung von Amphetamin als (1‐phenyl‐isopropyl)‐isothiocyanat
Authors: Brandenberger H. , Hellbach Esther 
Published: December 2004

AbstractAmphetamine (I) reacts spontaneously at room temperature with carbon disulfide to form (1‐phenyl‐isopropyl)‐isothiocyanate, which was identified by UV.‐, IR.‐ and mass spectrometry. This reaction is used for the analytical determination of I by gas chromatography. The characteristic peak shift which occurs after addition of carbon disulfide differentiates I from N‐methylamphetamine (II). The method is applied to urine analysis of I and II (which partially metabolizes to I) and might be useful in doping control.
Über pentacyclische Azofarbstoff‐ Chrom (III)‐und kobalt (III)‐komplexe vom «DREW‐PFITZNER»‐Typus
Authors: Schetty G. 
Published: December 2004

AbstractFor the first time pentacyclic azo dyestuff chromium(III) and cobalt(III) complexes with Drew‐Pfitzner configuration have been produced. Comparison of their electronic spectra with those of analogous 1:2 complexes enables novel conclusions as to the shape of the octahedron formed by the metal‐binding atoms.