bluuebunny/crossref_metadata_2025_split huggingface dataset:
Die Strukturen der mittleren Ringverbindungen. VII. 1,6‐trans‐Dibromcyclodecan
Authors: Dunitz J. D. , Weber H. P. 
Published: December 2004

AbstractCrystals of 1,6‐trans‐dibromcyclodecane are monoclinic, a = 7,94, b =5,65, c = 12,78 A, β = 106° 47′, space group P2, lc. The unit cell contains two centrosymmetric molecules. The crystal structure has been determined by analysis of the three prin‐ cipal projections. The ring skeleton has the same conformation as that found in all previously studied cyclodecane compounds, with the substituents in (IIe, IIe) positions.
Assoziationserscheinungen bei Azofarbstoffen
Authors: Milićević B. , Eigenmann G. 
Published: December 2004

AbstractAqueous solutions of the two dyestuffs orange‐8 and orange‐II have been investigated by means of osmometry, spectroscopy, viscometry and response to a sodium ion specific electrode. The results indicate that orange‐8 solutions contain mainly monomeric anions of the dye, even in concentrations near the limit of solubility, while solutions of orange‐I1 in concentrations above about 10−2mole/liter contain mainly dimeric anions. The behaviour of orange‐8 can best be described as that of a typical strong 1:1 electrolyte.
Die ESR.‐Spektren der Radikal‐Ionen des trans‐15, 16‐Dimethyldihydropyrens und seines Semichinons
Authors: Gerson F. , Heilbronner E. , Boekelheide V. 
Published: December 2004

AbstractThe observed spin densities for the radical cation and anion of trans‐15,16‐di‐methyl‐dihydropyrene (I) are in good agreement with MO predictions based on unrestrained delocalisation in the peripheral 14‐membered π‐electron system. The symmetry of the MO's occupied by the unpaired electron in the two cases suggests that the central «butane» unit acts as an electron releasing group in the radical cation and as an electron accepting group in the radical anion.
Étude, en fonction de la constante σp de HAMMETT, du spectre de masse d'acétophénones p‐substituées
Authors: Buchs A. , Rossetti G. P. , Susz B. P. 
Published: December 2004

AbstractThe ionisation potential of acetophenones p‐substituted by NO2, Cl, H, CH3, OH, and NH2, and the appearence potential of the methyl, acetyl, and phenyl‐substituted ions formed by cleavage of these ketones have been determined by mass spectrometry.
Adenosin‐5′‐monophosphat‐N(1)‐oxid Ein «ambivalentes» Ligandsystem
Authors: Sigel H. , Brintzinger H. 
Published: December 2004

AbstractStructures of metal ion complexes of adenosine‐5′‐monophosphate‐N(1)‐oxide have been investigated by comparison of stability constants with those of adenosine‐5′‐monophosphate and by spectral measurements. In Cu2+‐complexes of adenosine‐5′‐monophosphate‐N(1)‐oxide Cu2+ is found to be bonded to the o‐amino‐N‐oxide ligand group within the whole pH range investigated. On the other hand, in complexes of other bivalent 3d‐metal ions, the binding of the metal ion involves only the phosphate group at neutral or weakly acid pH, whereas at higher pH these complexes are deprotonated with simultaneous formation of a chelate at the o‐amino‐N(1)‐oxide group. This behaviour can be explained in terms of the coordination tendency of the two coordination sites in the adenosine‐5′‐monophosphate‐N(1)‐oxide molecule towards the respective metal ions, if proper account is taken of the concurrent coordination of protons.
Synthèses et relations entre constitution chimique et odeur dans la série des terpényl‐3‐cyclohexanols
Authors: Demole Edouard , Stoll M. 
Published: December 2004

AbstractThe three 3‐(2, 2, exo‐3‐trimethyl‐exo‐5‐norbornyl)‐ (Ia), 3‐(endo‐2‐bornyl)‐ (Ib), and 3‐(1, 3, 3‐trimethyl‐exo‐6‐norbornyl)‐cyclohexanols (Ic) have been synthesized, and the relationship between their structure and their odour studied. Only the axial epimer of Ia has been found to possess a very strong and typical sandalwood odour.
Die Auslösung von Fenton‐Reaktionen durch cytotoxische Methylhydrazin‐Verbindungen
Authors: Berneis K. , Kofler M. , Bollag W. 
Published: December 2004

AbstractUltracentrifugal studies demonstrate that cytotoxic methylhydrazine derivatives such as 1‐methyl‐2‐benzyl‐hydrazine break down nucleic acids much more than added hydrogen peroxide in solution of low content of iron ions. It is further shown that the methylhydrazine derivatives mentioned increase the reactivity of hydrogen peroxide towards deoxyribose. The conclusion is that the cytotoxic methylhydrazine derivatives not only produce hydrogen peroxide but that they also promote reactions between hydrogen peroxide and organic compounds. The latter effect is ascribed to the initiation of FENTON chain reactions by the methylhydrazine derivatives or by the free radicals formed in the course of their autoxidation. The relevance of these results to the biological activity of the methylhydrazine derivatives has not yet been established.
Die Synthese des Ergosins und des Valin‐Analogen der Ergotamin‐Gruppe. 61. Mitteilung über Mutterkornalkaloide
Authors: Stadler P. A. , Frey A. J. , Ott H. , Hofamann A. 
Published: December 2004

AbstractThe total synthesis of ergosine, a naturally occurring ergot alkaloid, and of ergovaline, which contains valine as the variable amino acid of the peptide part and has not been found in nature yet, is described in accordance with the process developed for the synthesis of ergotamine.
Die Cardenolide der Samen von Antiaris toxicaria Lesch. 1. Mitteilung: Isolierungen und Identifizierungen Glykoside und Aglykone, 258. Mitteilung
Authors: Mühlradt P. , Weiss Ek. , Reichstein T. 
Published: December 2004

AbstractIn den Samen von Antiaris toxicaria LESCH. liessen sich nach fermentativem Abbau mit den sameneigenen Fermenten 34 Cardenolide nachweisen. 16 konnten nach chromatographischen Trennungeii in Kristallen isoliert werden. Von diesen liessen sich 10 mit bekannten Cardenoliden identifizieren, 6 waren neu. Ihre Struktur liess sich teilweise aufklären. ‐ Der Vergleich ergibt, dass die Samen wesentlich andere Glykoside produzieren, als sie früher im Latex derselben Pflanze gefunden wurden. Erheblich verschieden sind vor allem die Zucker. In den Samen wurden Derivate der 6‐Desoxy‐D‐allose sowie eines neuen Zuckers, der Javose gefunden.
Synthetische Analoge des Hypertensins. V. α‐L‐,β‐L‐, α‐D‐ und β‐D‐Asp1‐Val5‐Hypertensin II; Desamino‐Val5‐Hypertensin II
Authors: Riniker B. , Schwyzer R. 
Published: December 2004

AbstractThe preparation of the 4 isomeric octapeptides α‐L‐,β‐L‐, α‐D‐, and β‐D‐Asp1‐Va15‐hypertensin II, and of their parent compound, desamino‐Val5‐hypertensin II, is described.
Die Komplexchemie des Methylquecksilber‐Kations
Authors: Schwarzenbach G. , Schellenberg M. 
Published: December 2004

AbstractThe stability constants of the methylmercury complexes CH3HgL1−λ with a considerable number of ligands Lλ− have been determined (Table 1). Like H+, the cation CH3Hg+ reveals the coordination number 1 almost exclusively. Some ligands form also binuclear adducts (CH3Hg)2L2−λ and sulfide even forms (CH3Hg)3S+. The coordination behaviours of CH3Hg+ and H+ however are very different concerning the selection of ligands, the former being a soft and the latter a hard acid in the sense of PEARSON. The entropy ΔS of the reaction: H+ + L− → HL is more positive by about 14 c.u. than ΔS of the reaction: CH3HG+ + L− → CH3HgL. The hydrogen ion in aqueous solution has a far greater order producing action on the solvent than CH3Hg+. Two dyes also have investigated, which may serve as indicators for CH3HG+ and for the determination of pCH3Hg (= −log[CH3Hg+]).
Über die Struktur von Verrucarin B. Verrucarine und Roridine, 6. Mitteilung
Authors: Gutzwiller J. , Tamm Ch. 
Published: December 2004

AbstractFor verrucarine B (C27H32O9), a companion of the antibiotic verrucarine A, structure 1 is proposed. In verrucarine B an epoxy group replaces the hydroxyl group of verrucarine A.
Röntgenkontrastmittel. 6. Mitteilung. Jodierte Derivate der 3‐Aminomethyl‐benzoesäure
Authors: Felder E. , Pitré D. , Fumagalli L. 
Published: December 2004

AbstractA number of mono‐ and of diacylated 3‐aminomethyl‐5‐amino‐2,4,6‐triiodobenzoic acids have been synthesized for evaluation as X‐ray contrast agents. 3‐Acetamidomethyl‐5‐acetamido‐2,4,6‐triiodobenzoic acid seems to be a promising urographic agent [1].
Die Struktur des Alkaloids C‐Calebassin
Authors: Fehlmann M. , Koyama H. , Niggli A. 
Published: December 2004

AbstractThe crystal structure determination of C‐calebassine iodide C40H48O2N4I2,nH2O has shown that the structure of the alkaloid ion is in agreement with formula Ia, proposed by P. KARRER et al. [3] (cf. structure formula). As the refinement is still going on, further details will be published in Z. Krist.
Neue Synthese von Lactamen der Dibenz[b,f]‐1,4‐thiazepin‐, ‐oxazepin und Dibenz[b, e]‐azepin‐Reihe. 4. Mitteilung über siebengliedrige Heterocyclen
Authors: Schmutz J. , Künzle F. , Hunziker F. , Bürki A. 
Published: December 2004

AbstractBy intramolecular application of LEUCKART's amide synthesis using isocyanato‐diphenylsulphides, ‐diphenyloxides and ‐diphenylmethanes with AlCl3 in o‐dichlorobenzene a method has been found which gives in very good yields 10,11‐dihydro‐11‐oxo‐dibenz[b,f]‐1,4‐thiazepines (VII), ‐oxazepines (VIII), and 5,6‐Dihydro‐6‐oxo‐dibenz[b,e]‐azepines (XI), respectively.
Notiz über ringbildende Kondensationen von Homophtalsäure‐dimethylester mit α,β‐ungesättigten Carbonylverbindungen
Authors: Eisenhuth W. , Renfroe H. B. , Schmid H. 
Published: December 2004

AbstractEs werden basenkatalysierte Kondensationen von Homophtalsäure‐dimethylester mit einigen α,β‐ungesättigten Carbonylverbindungen beschrieben, die zu neuen hydroaromatischen Ringverbindungen führen. Das mit Cumarin entstehende Kondensationsprodukt hat man dehydriert und einigen weiteren Reaktionen unterworfen.
Struktur von Coleon A
Authors: Karanatsios D. , Eugster C. H. 
Published: December 2004

AbstractFür Coleon A, das Hauptpigment aus den Blättern von Coleus igniarius SCHWEINF. (Labiatae), wird die Struktur I bewiesen. Es wird die Vermutung ausgesprochen, dass es biogenetisch ein hoch oxydiertes Derivat eines 1,10‐seco‐Diterpens der Abietanreihe vorstellt. Zur Festlegung der relativen Substituentenanordnung im Chinonteil hat sich die Methode der Überführung in Indenoncarbonsäuren als geeignet erwiesen. Neben Coleon A und B sind die optisch aktiven Coleus‐Substanzen C und D, beide C30H50O, isoliert worden. Es wird auf die Tatsache hingewiesen, dass oxydierte und modifizierte Diterpene bisher vor allem in Vertretern der Labiaten aufgefunden worden sind.
Restlose Überführung organischer Verbindungen in gasförmige Produkte zur gleichzeitigen Bestimmung von 3H und 14C in Proportionalzählrohren
Authors: Jordan P. , Lykourézos Ph. A. P. 
Published: December 2004

AbstractZur gleichzeitigen Bestimmung von 3H und 14C in organischen Substanzen durch Gas‐Proportionalzählung wird ein pyrolytisches Verfahren beschrieben, welches erlaubt, den Wasserstoff und den Kohlenstoff dieser Substanzen in einer einzigen Operation restlos in gasförmige Reaktionsprodukte überzuführen.
Bullosid (Teilstruktur). Glykoside und Aglykone, 266. Mitteilung
Authors: Duncan G. R. , Weiss Ek. , Reichstein T. 
Published: December 2004

AbstractBulloside was found to be the glycoside of digitoxigenin with a disaccharide. The latter ist most probably either thevetosido‐digitoxose, not yet known in pure state, or a stereoisomer of this biose.
Stoffwechselprodukte von Mikroorganismen 49. Mitteilung. Die Ferrioxamine A1, A2 und D2
Authors: Keller‐Schierlein W. , Mertens P. , Prelog V. , Walser A. 
Published: December 2004

AbstractThe structures of the ferrioxamines A1, A2, and D2, minor components of the sideramine mixtures from cultures of Streptomyces, have been determined by degradation and, in part, by synthesis. Whereas the previously investigated ferrioxamines B, D1, E, and G contain but a single basic component, 1‐amino‐5‐hydroxylaminopentane, the ferrioxamines A1, A2, and D2 contain in addition to this base its lower homologue, 1‐amino‐4‐hydroxylamino‐butane.
Über die Isolierung von Verrucarin H, Verrucarin J, Roridin D und Roridin E aus Myrothecium‐Arten. Verrucarine und Roridine, 8. Mitteilung
Authors: Böhner B. , Fetz E. , Härri E. , Sigg H. P. , Stoll Ch. , Tamm Ch. 
Published: December 2004

AbstractFrom cultures of Myrothecium verrucaria (ALBERTINI et SCHWEINITZ) DITMAR ex FRIES and Myrothecium roridum TODE ex FRIES four additional metabolites have been isolated: verrucarin H (C29H36O8), verrucarin J (C27H32O8), roridin D (C29H38O9) and roridin E (C29H38O8). They are closely related to verrucarin A and B, since they contain the sesquiterpenoid alcohol verrucarol as structural element.
Beiträge zur Chemie der Carotinoide. 3. Mitteilung Darstellung von 5‐Hydroxy‐5,6‐dihydro‐β‐carotin
Authors: Grob E. C. , Siekmann W. 
Published: December 2004

AbstractBy reduction of β‐Carotene‐monoepoxide with LiAlH4 we have obtained a product with the probable structure of 5‐Hydroxy‐5,6‐dihydro‐β‐carotene, as deduced from visible, IR. and NMR. spectra, as well as from thinlayer‐chromatography data.
Synthesen in der Polymyxinreihe. 10. Mitteilung. Die Synthese von Colistin A (Polymyxin E1)
Authors: Studer R. O. , Lergier W. , Lanz P. , Böhni Erika , Vogler K. 
Published: December 2004

AbstractColistin A (Polymyxin E1), an antibiotic isolated in 1950 from cultures of B. colistinus, is shown by synthesis to have the cyclo‐heptapeptide structure VI (Figure 1) already proposed by other workers on the evidence of degradation studies.
Synthese von All‐D‐Val5‐Angiotensin II‐Asp1‐β‐Amid
Authors: Vogler K. , Studer R. O. , Lergier W. , Lanz P. 
Published: December 2004

AbstractThe synthesis of all‐D‐Val5‐Angiotensin II‐Asp1‐β‐Amide (Scheme 2), the antipode of the active principle of Hypertensin CIBA®, is carried out according to known schemes in the L‐series. It showed neither inhibitory nor angiotensin‐like effects up to concentrations of 10−3.
Zum Stoffwechsel von Noveril®: 14C‐Markierung und Synthese von Metaboliten 6. Mitteilung über siebengliedrige Heterocyclen
Authors: Hunziker F. , Schindler O. 
Published: December 2004

Abstract5‐Methyl‐10‐β‐dimethylamino‐ethyl‐10, 11‐oxo‐5H‐dibenzo[b, e]‐1,4‐diazepin (I; base of Noveril®) has been labelled with 14C in the basic side chain for the purpose of metabolism studies. The synthesis of several postulated metabolites has also been described.
Photochemische Reaktionen. 31. Mitteilung. [1]. Die photochemische Isomerisierung von C(‐10)‐diastereomeren 3‐Oxo‐Δ1;5‐Steroiden
Authors: Nann B. , Wehrli H. , Schaffner K. , Jeger O. 
Published: December 2004

AbstractThe photochemical transformation of 3‐oxo‐17β‐acetoxy‐Δ1;5‐androstadiene (2) and its 10α‐diastereoisomer 7 has been investigated. With low conversion of 2, an isomer was produced for which structure 8 (6β‐H) is proposed. After longer photolysis times, both compounds, 2 and 8, were consumed, and the four stereoisomeric photoproducts 9–12 were obtained. Products 9 and 10 on one hand, and 11 and 12 on the other, are photochemically interconvertible. Dienone 7 yielded a very similar product mixture from which ketones 10 and 12 could be isolated. Further, the presence of a dienone isomer was demonstrated to which structure 8 (6α‐H) is assigned.
Sur la composition de l'arôme de café [1]
Authors: Viani R. , Müggler‐Chavan F. , Reymond D. , Egli R. H. 
Published: December 2004

AbstractA gas‐chromatographic investigation of coffee aroma has revealed, besides 34 known components, the presence of 4 new substances: 2,3‐dimethylpyrazine, γ‐buty‐rolactone, O‐acetylacetol and hexane‐2,3‐dione. The fragmentation pattern of 2‐Methyl‐tetrahydrofuran‐3‐one, a known component of coffee aroma, has been determined by means of high resolution mass spectrography.
Herstellung hydrierter Produkte aus 1‐Acetyl‐2, 6‐dioxo‐2, 3, 4, 6‐tetrahydro‐pyrido [2, 1‐a] isoindol. 2. Mitteilung [1]
Authors: Viscontini M. , Kaiser W. 
Published: December 2004

Abstract1‐Acetyl‐2,6‐dioxo‐2,3,4,6‐tetrahydro‐pyrido[2,1‐a]isoindol (II) liefert bei der katalytischen bzw. NaBH4‐Reduktion zwei Tetrahydro‐stereoisomere VII und X, deren Konfiguration und Konformation mit Hilfe von IR.‐ und NMR.‐Spektren aufgeklärt wurden.
Note sur la décomposition du nitrate de triphénoxyméthylphosphonium
Authors: Hudson R. F. , Chopard P. A. 
Published: December 2004

AbstractIn the course of the decomposition of triphenylphosphonium nitrate, the adduct of two molecules of phenol with one molecule of benzoquinone was isolated in small yields. The benzoquinone is probably produced by radical oxidation of phenol by nitrogen pentoxide, itself produced by reaction between nitrate ions and the quasiphosphonium nitrate, postulated as an intermediate in the main reaction leading to a mixture of o‐ and p‐nitrophenols.
Réactions du diazométhane II. Transformation de la fonction N‐(phénylthio‐carbonyle) de la N‐(phénylthio‐carbonyl)‐aniline avec production de phénylthio‐acétanilide par insertion
Authors: Baudet P. , Calin M. , Cherbuliez E. 
Published: December 2004

AbstractThe reaction of diazomethane with N‐(phenylthio‐carbonyl)‐aniline gives on the one hand phenylthio‐acetanilide and on the other N‐phenylpropiolactame. This β‐lactame arises by the (known) addition of two molecules of diazomethane to phenyl isocyanate, the latter resulting by an elimination (E2) of the thiophenyl residue in the form of thio‐anisole, originating from the direct action of diazomethane on the N‐(phenylthio‐carbonyl) group. The acetanilide is produced by the insertion of a methylene group (furnished by diazomethane) with fissure of the sulphur‐carbon linkage in the grouping It is probable that the mechanism of the transformation involves, as a first step, a bimolecular nucleophilic substitution on the carbonyl of the carbamate function, yielding a diazonium cation and a thiophyl anion; in a second step the diazonium ion reacts with the anion C6H5S⊖, establishing the linkage SCH2 with elimination of nitrogen.
Étude de la structure, par la diffraction des rayons X et la microscopie électronique, de l'hydroxylapatite calcique et des orthophosphates dits tri‐ et octocalciques
Authors: Vuilleumier Cl. , Lerch P. 
Published: December 2004

AbstractLa structure des orthophosphates de calcium étudiés, obtenus par diverses méthodes à l'état microcristallin, a été examinée à l'aide de la diffraction des rayons X et des électrons, du microscope électronique, de la mesure de la surface spécifique, de la thermogravimétrie et de l'analyse thermique différentielle. Les dimensions et les surfaces spécifiques des microcristaux et de leurs agrégats ont été déterminées; quant à la forme et à l'orientation des axes des microcristaux, il s'agit de longues aiguilles prismatiques à base hexagonale pour l'hydroxylapatite calcique et pour le phosphate tricalcique hydraté; le phosphate dit octocalcique est au contraire formé par des plaques, à cǒté d'un important matériel amorphe. Les résultats obtenus à I'aide de méthodes de diffraction et de la micrographie électronique appliquées à des produits chauffés à diverses températures jusqu' à 1000° confirment ceux de la thermogravimétrie et de l'analyse thermique différentielle.
Synthèse de la désamino1‐Arg8‐vasopressine et de la désamino1‐Phe2‐Arg8‐vasopressine, deux analogues possédant une activité antidiurétique plus élevée et plus sélective que celle des vasopressines naturelles
Authors: Huguenin R. L. , Boissonnas R. A. 
Published: December 2004

AbstractDeamino1‐Arg8‐vasopressin and deamino1‐Phe‐2Arg8‐vasopressin have been synthesized by condensation of L‐glutaminyl‐L‐asparaginyl‐S‐benzyl‐L‐cysteinyl‐L‐prolyl‐G‐tosyl‐L‐arginyl‐glycinamide with β‐benzylthio‐propionyl‐L‐tyrosyl‐L‐phenyl‐alanylazide and β‐benzylthio‐propionyl‐L‐phenylalanyl‐L‐phenylalanylazide, respectively. After removal of the protecting groups and oxidation with hydrogen peroxide, the deamino‐nonapeptides have been purified by counter‐current distribution. Deamino1‐Arg8‐vasopressin as well as deamino1‐Phe2‐Arg8‐vasopressin exhibit a higher antidiuretic activity (1300 IU/mg and 800 IU/mg, respectively) and a lower pressor activity than arginine‐vasopressin. This confers to both analogues, and especially to the latter, a remarkable selectivity of the antidiuretic action.
Stoffwechselprodukte von Mikroorganismen. 50. Mitteilung. Die Konfiguration der Arcanose
Authors: Roncari G. , Keller‐Schierlein W. 
Published: December 2004

AbstractThe L‐xylo configuration of arcanose, a sugar from the antibiotic lankamycin, has been proven by its transformation into cladinose. The determination of the absolute configuration at C‐3 of arcanose and cladinose has been accomplished utilizing a new procedure.
Hydrolyse und Alkoholyse von Reaktivfarbstoffen: I. Hydrolyse von Dichlortriazin‐Farbstoffen. 1. Mitteilung über reaktionsmechanistische Untersuchungen an Reaktivfarbstoffen
Authors: Rys P. , Zollinger Hch. 
Published: December 2004

Abstract
The kinetics of the hydrolysis of a dichlorotriazine reactive dye have been determined in aqueous buffer solutions at pH values between 8.50 and 13.47, at 24.0° and ionic strength I = 0.625.
The reaction order with respect to the concentration of the dye and the hydroxyl ions is a complex function of the reaction conditions.
Only in very dilute solutions the kinetics follow the mechanism postulated by Ackermann and Dussy [4].
Several types of base catalysis can be detected, depending on conditions (pH, concentrations).
Synthesen von Chinoxalin‐Derivaten
Authors: Zellner H. , Zellner G. 
Published: December 2004

AbstractEs werden in 1‐Stellung benzylierte und phenyläthylierte 3‐Benzyl‐1,2‐dihydrochinoxalin‐2‐one, 1,6,7‐trisubstituierte 1,2‐Dihydrochinoxalin‐2‐one und ‐3‐Methyldihydrochinoxalin‐2‐one, verätherte 2‐Hydroxy‐chinoxaline, sowie 1,2,3,4‐Tetrahydrochinoxaline und deren Quartärisate beschrieben, die zwecks pharmakologischer Prüfung synthetisiert wurden.
Zum Zusammenhang zwischen Ligand‐Acidität und Metallkomplex‐Stabilität: Abnehmende Stabilität bei zunehmender Basizität
Authors: Sigel H. , Kaden Th. 
Published: December 2004

AbstractThe increase of the stability of metal ion complexes with decreasing basicity of the ligands within different series is discussed with the help of the equation of IRVING & ROSSOTTI [4] [12] and explained in terms of the free energy G of the complexes.
Sur la composition de l'arôme de thé
Authors: Müggler‐Chavan F. , Viani R. , Bricout J. , Reymond D. , Egli R. H. 
Published: December 2004

AbstractA gas‐chromatographic investigation of black tea aroma has revealed, besides 19 known components, the presence of 4 new substances: 1‐penten‐3‐ol, trans‐2‐hexen‐1‐ol, α‐terpineol and β‐ionone. The fragmentation pattern of 1‐penten‐3‐ol has been determined by means of high resolution mass spectrography.
Einsatz gas‐chromatographischer Kolonnen hoher Trennleistung in direkter Kombination mit Massenspektrometer
Authors: Völlmin J. A. , Omura I. , Seibl J. , Grob K. , Simon W. 
Published: December 2004

AbstractA routine instrument for the combination of a single focusing mass spectrometer with high efficiency tubular as well as packed GC columns using a molecule separator is described. The application of the unit in the analysis of cigarette smoke is given.
Zerfall der Dimeren des Acenaphtylens als Folge der Alkalimetall‐Reduktion
Authors: Gerson F. , Weidmann B. 
Published: December 2004

AbstractTrans‐ and cis‐dinaphthylene‐cyclobutane formed by photodimerisation of acenaphthylene are shown to produce the radical anions of the monomer on sodium reduction. This is explained in terms of the large energy difference between the lowest antibonding MOs of the dimers and of the monomer.
Synthese und Abbau von 1‐(5‐Nitro‐2‐thiazolyl)‐2‐imidazolidinon und Derivaten
Authors: Wilhelm M. , Marquardt F.‐H. , Meier Kd. , Schmidt P. 
Published: December 2004

Abstract1‐(5‐Nitro‐2‐thiazolyl)‐2‐imidazolidinone is synthesized from 2‐amino‐5‐nitro‐thiazole and 2‐chloroethyl‐isocyanate. The structure of this new potent schistosomicide is established by acid and alkaline degradation as well as by synthesis starting from 2‐imidazolidinone. A number of derivatives of 1‐(5‐nitro‐2‐thiazolyl)‐2‐imidazolidinone are reported.