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1Author    W. G. Filby, W. H. KalusRequires cookie*
 Title    E. Radiation Chemistry of Diphenylpicrylhydrazyl (DPPH), IV* The Mass Spectra of Some Aromatic Hydrazines. Comparison of Radiolytic and Photolytic Fragmentations  
 Abstract    The mass spectra of some aryl hydrazines under electron impact are reported. In every case studied fragmentation occurs via fission of the weak hydrazyl N-N bond and hydrogen migration. Metastable ion data is presented in support of a proposed mechanism and some comparisons made between electron and radiation induced processes. 
  Reference    (Z. Naturforsch. 31b, 1372—1375 [1976]; received May 31 1976) 
  Published    1976 
  Keywords    Mass Spectra, Aromatic Hydrazines, Mass Spectra 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1372.pdf 
 Identifier    ZNB-1976-31b-1372 
 Volume    31 
2Author    G.Requires cookie*
 Title    Reactivity and Spectroscopic Properties of Acylisonitrile Chromium Pentacarbonyls  
 Abstract    The title compounds react with nucleo­ philes similar to activated carboxylic acid derivatives. There is no indication of acyliso­ nitrile fragments on either thermolysis or mass spectrometry. 
  Reference    (Z. Naturforsch. 30b, 982—983 [1975]; eingegangen am 24. Juni 1975) 
  Published    1975 
  Keywords    Solvolysis, 13C NMR, Mass Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0982_n.pdf 
 Identifier    ZNB-1975-30b-0982_n 
 Volume    30 
3Author    Kurt MoedritzerRequires cookie*
 Title    -Chloro-and l-Hydroxyphospholene-l-stilfides l-Chlorophospholene-l-sulfi.de Isomers, 1-Hydroxyphospholene-l-sulfide Isomers  
 Abstract    A mixture of the two isomers of 1-chlorophospholene-l-oxide, obtained by a one-step, high-yield procedure reported previously 1 , upon reaction with P4S10 was converted to a mixture of the two isomers of 1-chlorophospholene-l-sulfide which may be separated by spinning-band distillation. The thus obtained isomerically pure 1-chlorophospholene-1-sulfides were hydrolyzed to the corresponding 1-hydroxyphospholene-l-sulfides. These, as well as the precursor chloro compounds, were characterized by iH, 13 C, and 31 P NMR, mass spectrometry, and IR. 
  Reference    (Z. Naturforsch. 31b, 709—713 [1976]; received January 20 1976) 
  Published    1976 
  Keywords    NMR, Mass Spectra, IR 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0709.pdf 
 Identifier    ZNB-1976-31b-0709 
 Volume    31 
4Author    HerbertW. Roesky, Karsten Swarat, Frank EdelmannRequires cookie*
 Title    Darstellung eines cyclischen Ferrocenderivates mit Wolfram (VI) Preparation of a Cyclic Ferrocene Derivative of Tungsten(VI)  
 Abstract    Ph2PC 5 H4FeC 5 H4PPh2 (1) reacts with Me3SiN3 with evolution of nitrogen to yield (Me3SiN = PPh2C 5 H4)2Fe (2). Treatment of 2 with WF6 results in the formation of (C 5 H4PPh2N)2FeWF4 (3). 3 is a rare example of a metal complex containing two metal atoms in very different oxidation states. 
  Reference    Z. Naturforsch. 43b, 231—232 (1988); eingegangen am 13. Oktober 1987 
  Published    1988 
  Keywords    Phosphorus, Heterocycles, Mass Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0231.pdf 
 Identifier    ZNB-1988-43b-0231 
 Volume    43 
5Author    Willy GomblerRequires cookie*
 Title    Partiell fluorierte Dialkyldisulfane Partially Fluorinated Dialkyldisulfanes  
 Abstract    Gaseous methylsulfenylchloride, CH3SCI, reacts with active potassium fluoride at 100 °C to give methyl(fluoromethyl)disulfane, CH3SSCH2F. This compound decomposes at room temperature to yield dimethyldisulfane and bis(fluoromethyl)disulfane. The new compounds have been identified by iH and 19 F NMR and mass spectra. 
  Reference    (Z. Naturforsch. 31b, 727—729 [1976]; eingegangen am 4. Februar/5. März 1976) 
  Published    1976 
  Keywords    Sulfur-fluorine Chemistry, Sulfenylhalides, Preparation, NMR, Mass Spectra 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0727.pdf 
 Identifier    ZNB-1976-31b-0727 
 Volume    31 
6Author    J. Heimbrecht, K. Levsen, H. SchwarzRequires cookie*
 Title    and their [M-CH3] + Fragments  
 Abstract    In contrast to the corresponding butyl ions the [M-CH3]+ ions from isomeric pentyl-benzenes do not isomerise completely to a mixture of interconverting structures prior to decomposition. 
  Reference    (Z. Naturforsch. 31b, 1299—1300 [1976]; received June 3 1976) 
  Published    1976 
  Keywords    Collisional Activation Spectra, Isomerisation, Mass Spectra, Hydrocarbons 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1299_n.pdf 
 Identifier    ZNB-1976-31b-1299_n 
 Volume    31 
7Author    Requires cookie*
 Title    Radiation Chemistry of Carbohydrates, XV OH Radical Induced Scission of the Glycosidic Bond in Disaccharides  
 Abstract    H e n r y k Z e g o t a * * a n d C l e m e n s v o n S o n n t a g In the y-radiolysis of deoxygenated, NaO-saturated aqueous solutions of maltose, lactose, gentiobiose, melibiose, trehalose and sucrose carbohydrate products containing five or six carbon atoms have been identified and their G-values measured. These products originate from the OH radical induced scission of the glycosidic bond of the disaccharides. The nature of the products is in agreement with a reaction scheme proposed previously for the radical induced scission of the glycosidic bond of cellobiose. It involves hydrolysis and the rearrangements of radicals with the free spin next to the glycosidic bond and to the lactol bridge. The nature the glycosidic bond (a, ß, 1-4, 1-6, 1-1, 1, 2) has only little influence on the G-values of its scission which range between about 1.9 and 3.5. 
  Reference    (Z. Naturforsch. 32b, 1060—1067 [1977]; received May 31 1977) 
  Published    1977 
  Keywords    y-Radiolysis, G-values, Mass Spectra, Radical Reactions 
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 TEI-XML for    default:Reihe_B/32/ZNB-1977-32b-1060.pdf 
 Identifier    ZNB-1977-32b-1060 
 Volume    32 
8Author    A. Kettrup, P. Ackermann, W. RiepeRequires cookie*
 Title    Massen-, NMR-und IR-spektroskopische Untersuchungen an Berylliumchelaten substituierter Acetoacetanilide Investigations of Beryllium Chelates with Substituted Acetoacetanilides by Mass. NMR and IR Spectroscopy  
 Abstract    Correlation of measurements by mass, NMR and IR spectrometry were carried out for the determination of the structure and stability of beryllium chelates of substituted aceto-acetanilides. The substituents at the phenyl ring of the amide group influence the position of the stretching vibrations of the beryllium-oxygen bonds, the chemical shift of the amide proton and also the abundance ratios of specific ions of fragments in the respective mass spectra. All these results are correlated and represent data for the stability of these metal chelates. 
  Reference    Z. Naturforsch. 33b, 183—189 (1978); eingegangen am 6. Oktober/2. Dezember 1977 
  Published    1978 
  Keywords    Berylliumchelates, Mass Spectra, Hammett a-Values 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0183.pdf 
 Identifier    ZNB-1978-33b-0183 
 Volume    33 
9Author    C. E. May, K. Niedenzu, S. TrofimenkoRequires cookie*
 Title    Spectroscopic Studies on Pyrazaboles  
 Abstract    The mass spectra of several pyrazaboles of type 1 where R and'or R' = C2H5 have been studied. The loss of boron-bonded hydrocarbon moieties under electron impact is the predominant feature of all spectra. Some ultraviolet and nuclear magnetic resonance data on compounds of type 1 have been collected; bulky substituents were observed to lead to conformational isomers that can be detected by 13 C NMR spectroscopy. 
  Reference    Z. Naturforsch. 33b, 220—223 (1978); received October 11 1977 
  Published    1978 
  Keywords    Pyrazaboles, Dimeric Aminoboranes, Boron Compounds, Mass Spectra, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0220.pdf 
 Identifier    ZNB-1978-33b-0220 
 Volume    33 
10Author    G. J. Bukovits, N. Mohr, H. Budzikiewicz, H. Korth, G. PulvererRequires cookie*
 Title    2-Phenylthiazol-Derivate aus Pseudomonas cepacia [1] 2-Phenylthiazole Derivatives from Pseudomonas cepacia [1]  
 Abstract    From the culture medium of Pseudomonas cepacia 2-(o-hydroxyphenyl)-thiazol and its 4-carbaldehyd and 4-carboxylic acid derivatives (aeruginoic acid) could be isolated. Their structures were elucidated and confirmed by synthesis. 
  Reference    Z. Naturforsch. 37b, 877—880 (1982); eingegangen am 1. März 1982 
  Published    1982 
  Keywords    Phenylthiazols, Bacterial Metabolites, Pseudomonas cepacia, Mass Spectra 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0877.pdf 
 Identifier    ZNB-1982-37b-0877 
 Volume    37 
11Author    Roland Wolfschütz, Wilfried Franke, Nikolaus Heinrich, Helmut Schwarz, Wolfgang Blum, WilhelmJ. RichterRequires cookie*
 Title    Eliminierung von Aceton und Bildung von protoniertem Aceton bei der chemischen Ionisation von []-Tetramethylcyclohexanon Elimination of Acetone and Formation of Protonated Acetone from [2,2,6,6]-Tetramethylcyclohexanone under the Condition of Chemical Ionisation  
 Abstract    By means of appropriately D and 13 C labelled precursors it is shown that the proton catalysed degradation of [2,2,6,6]-tetramethyl cyclohexanone {e.g. elimination of acetone and formation of protonatecl acetone from [MH]+) proceeds via two distinct pathways. The energetically favoured one (pathway A, Scheme 1) involves a sequence of [l,2]-methyl migration, ring contraction and methyl migration, whereas the energetically less attractive path B commences with a Wagner-Meerwein ring contraction, followed by hydroxyl and methyl migration. Semi-empirical quantum mechanical calculations (MNDO) are em-ployed to explore computationally relevant parts of the potential energy surface. The syntheses of the specifically 13 C labelled title compounds (1 a, b) are described in detail. 
  Reference    Z. Naturforsch. 37b, 1169—1173 (1982); eingegangen am 19. März 1982 
  Published    1982 
  Keywords    Wagner-Meerwein Rearrangement, Mass Spectra, Potential Energy Surface Calculations 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1169.pdf 
 Identifier    ZNB-1982-37b-1169 
 Volume    37 
12Author    Jörn Müller, Wolfgang Hähnlein, Barbara PassonRequires cookie*
 Title    TT-Olefin-Iridium-Komplexe, IX [1] Bis(?y 4 -butadien)-(7-organyl-iridium-Verbindungen TI-Olefin Iridium Complexes, IX [1] Bis(fy 4 -butadiene)-cr-organyl-iridium Compounds  
 Abstract    Complexes of the type [L2IrR] (L = butadiene, isoprene, piperylene, 1,4-and 2,3-dimethylbutadiene; R = CH3, CeHs) have been synthesized by reactions of [L2IrCl] with LiR in hexane. With L = 2,3-dimethylbutadiene, [L2IrR] compounds with higher alkyl groups R (e.g. n-C3H7, n-CjHg) can be obtained which for steric reasons are inert against ^-elimination. Th© system [L2IrCl]/L/LiAlH4 (L = 2,3-dimethylbutadiene) yields [L2IrR] with R = 2,3-dimethylbutene-2-yl. The complexes were characterized by NMR and mass spectra. 
  Reference    Z. Naturforsch. 37b, 1573—1579 (1982); eingegangen am 8. Juli 1982 
  Published    1982 
  Keywords    Synthesis, Mass Spectra, NMR Spectra, yr-Olefm Iridium Complexes 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1573.pdf 
 Identifier    ZNB-1982-37b-1573 
 Volume    37 
13Author    Requires cookie*
 Title    Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen H etero­ cyclen, X X X V III [1]  
 Abstract    Fünf-und sechsgliedrige Oxaphosphamolybdacycloalkane durch reduktive Cycloeliminierung P rep aratio n and P ro p erties of, and R eactions w ith, M etal-C ontaining H eterocycles, X X X V III [1] Five-and S ix-M em bered O xaphospham olyb-dacycloalkanes by R eductive C ycloelim ination E k k eh a rd L indner* und A n d re as Brösam le The reductive cycloelim ination o f the com plexes Lm(Br)M oPPh20 (C H 2)n-Cl (3a,b) [n = 2 (a), 3 (b); LmMo = 775-C5H 5M o(C O)2], which can be obtained from the reaction o f PPh2Ö —(C H 2)n—Cl (la ,b) and 
  Reference    Z. Naturforsch. 39b, 535 (1984); eingegangen am 11. N ovem ber 1983 
  Published    1984 
  Keywords    O xaphospham olybdacycloalkanes, NM R Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0535_n.pdf 
 Identifier    ZNB-1984-39b-0535_n 
 Volume    39 
14Author    Lutz Grotjahn, Ludger ErnstRequires cookie*
 Title    Ligand Exchange in FAB Mass Spectrometry of Monomerie and Dimeric Corrinoids  
 Abstract    In the Fast Atom Bombardment (FAB) mass spectra of monomeric and dimeric corrinoids, exchange of metal-bound ligands against matrix particles is observed which leads to pseudo molecular ions. Negative ion FAB mass spectra in particular, give distinct information on the intact molecular units. 
  Reference    Z. Naturforsch. 39b, 1548—1552 (1984); received April 9 1984 
  Published    1984 
  Keywords    Mass Spectra, Corrinoids, Vitamin B 12 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1548.pdf 
 Identifier    ZNB-1984-39b-1548 
 Volume    39 
15Author    Joseph Grobe, Due Le VanRequires cookie*
 Title    Reactive E=C (p-p)jr-Systems III [1]: Diels Alder Reactions with F 3 CP=CF 2 as Dienophile  
 Abstract    The perfluorophosphaalkene F 3 CP=CF 2 (1) reacts as a dienophile at temperatures between —20 and +15 °C with cyclopentadiene, 1,3-cyclohexadiene, butadiene and 2,3-dimethyl-butadiene, respectively, giving the corresponding Diels-Alder adducts 2 to 5 in high yields. The observed reactivity proves the close relationship of P=C and C=C systems. CF2 >F^ CF 2 
  Reference    Z. Naturforsch. 40b, 467—469 (1985); eingegangen am 27. November 1984 
  Published    1985 
  Keywords    Perfluorophosphaalkene, Diels-Alder Reactions, Mass Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0467.pdf 
 Identifier    ZNB-1985-40b-0467 
 Volume    40 
16Author    Joseph Grobe, Jürgen SzameitatRequires cookie*
 Title    Reaktive E =C (p—p);r-Systeme, X [1] Darstellung und Reaktivität von Perfluor-3-phosphapent-2-en (1) Preparation and Reactivity of Perfluoro-3-phosphapent-2-ene (1)  
 Abstract    Preparation o f F SC2P = C (F)C F 3, Cycloaddition to D ien es, 
  Reference    Z. Naturforsch. 41b, 974 (1986); eingegangen am 27. März 1986 
  Published    1986 
  Keywords    Chiral Phosphanes, Mass Spectra, NM R Spectra 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0974.pdf 
 Identifier    ZNB-1986-41b-0974 
 Volume    41 
17Author    F. H., W. P.Requires cookie*
 Title    Hexa(isocyanato)disilane  
 Abstract    The new compound hexa(isothiocyanato)-disilane, Si2(NCO)6, is prepared by reaction of Si2Br6 and AgNCO in toluene, and is charac­ terized by mass, vibrational as well as UV spectra. 
  Reference    (Z. Naturforsch. 30b, 282—283 [1975]; eingegangen am 2. Januar 1975) 
  Published    1975 
  Keywords    Hexa(isocyanato)disilane, Vibrational Spectra, Mass Spectra, UV Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0282_n.pdf 
 Identifier    ZNB-1975-30b-0282_n 
 Volume    30 
18Author    Peter Paetzold, Peter Böhm, Anette Richter, Ernst SchollRequires cookie*
 Title    Synthese, Basenaddition und Fragmentierung der 1.3.2-Dioxaborolan-4-one Synthesis, Addition of Bases, and Fragmentation of l,3,2-Dioxaborolane-4-ones  
 Abstract    2,5,5-Triorgano-l,3,2-dioxaborolane-4-ones RB(-O-CO-CXY-O-) (2-6) can be prepared from a-hydroxycarboxylic acids XYC(OH)-COOH and dihalogenoorganoboranes RBHal2. They are much weaker Lewis acids than the 2-organo-l,3,2-dioxaborolane-4,5-diones RB(-O-CO-CO-O-) (1). The compounds 1 give 1:1 adducts with the bases DINO, MANO, PyO, and PSy, respectively; the crystal structure determination of If • DINO reveals a simple BO-coordination between the components. On electron impact, the chief fragmen-tation path is the elimination of C02 from compounds 1-6. The thermal degradation of 2-6 seems to be rather complicated in the liquid phase but is unique in the gaseous phase forming the compounds (RBO)3, CO, and XYC = 0. 
  Reference    (Z. Naturforsch. 31b, 754—764 [1976]; eingegangen am 5. Dezember 1975/8. März 1976) 
  Published    1976 
  Keywords    Dioxaborolanones, Molecular Structure, Mass Spectra, Crystal Structure, Gas-phase Thermolysis 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0754.pdf 
 Identifier    ZNB-1976-31b-0754 
 Volume    31 
19Author    S. TrofimenkoRequires cookie*
 Abstract    The mass spectra of several pyrazaboles of type 1 (R = H) have been studied. The data illustrate that electron impact causes three major fragmentation patterns for the species. Symmetrical cleavage of the pyrazabole followed by further breakdown is common to all compounds. In addition, those pyrazaboles containing H or CH3 at the C atoms of the pyrazole rings undergo an electron impact-induced rearrangement which appears to result in the formation of a species containing a B2N3 ring as a structural entity; subsequent breakdown leads to a B2N2 ring system. The mass spectra of halo-or pseudohalo-substi-tuted pyrazaboles evidence the ready loss of hydrogen halide as a predominant feature; no rearrangement ions are observed. 
  Reference    (Z. Naturforsch. 31b, 1662—1666 [1976]; received September 16 1976) 
  Published    1976 
  Keywords    Pyrazaboles, 1-Pyrazolylboranes, Dimeric Aminoboranes, Mass Spectra, Boron Compounds 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-1662.pdf 
 Identifier    ZNB-1976-31b-1662 
 Volume    31 
20Author    Manfred Weidenbruch, Claude Pierrard, Helge PeselRequires cookie*
 Title    Neue Siloxanverbindungen einiger Übergangsmetalle Silicon Compounds with Strong Intramolecular Steric Interactions, VIII [1] New Siloxane Compounds of Some Transition Metals  
 Abstract    Tri-£er£-butylsiloxane compounds of transition metals are obtained by two different routes, one of these involves condensation of tri-Zer£-butylsilanol with the binary oxides V2O5, CrC>3, M0O3, and Re2Ü7, while the other proceeds via a similar reaction between the chlorides VOCl3, NbCls, TaCls, Cr02Cl2, and the silanol. The new compounds, having good thermal stability and remarkable resistence to hydrolysis, are characterized by IR, 1 H NMR, and mass spectra. 
  Reference    Z. Naturforsch. 33b, 1468—47 (1978); eingegangen am 20. September 1978 
  Published    1978 
  Keywords    Tri-ierf-butylsiloxanes, Transition Metals, Steric Hindrance, Mass Spectra 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1468.pdf 
 Identifier    ZNB-1978-33b-1468 
 Volume    33