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1Author    Dieter Rehder, Hans-Christoph Bechthold, Ahmet Keçeci, Hartwig Schmidt, Michael SiewingRequires cookie*
 Title    A Comparative Study of Metal Shielding in Low Valent Vanadium, Niobium and Manganese Complexes  
 Abstract    Variations of the metal chemical shifts <5(51 V), <5(55 Mn) and <S(93 Nb) with the para-magnetic deshielding contribution to the overall shielding are discussed in terms of influences imposed by the ligand field splitting, the nephelauxetic effect and the covalency of the metal-to-ligand bond. Complexes under investigation are isoelectronic and/or iso-structural series [M(CO)6_nL"]<i (M = V, Nb: q = —1; M = Mn: q = + 1; n = 0-6), 7? 5 -C5H5M(CO)4-KLn (M = V, Nb; n = 0-4) and r? 5 -C5H5M(L /)2L (M = V, L' = NO; M = Mn, L' = CO). L is a monodentate or l/n oligodentate phosphine. <5 varies with the point symmetry of the complex, and with ligand parameters of primarily electronic or steric origin. Generally, for weak to medium ^-interaction, there is a decrease of shielding with decreasing yr-acceptor power of the ligand, increasing ligand bulkiness, increasing ring strains in chelate structures and increasing degree of substitution. For strong ^-inter-action, the trends may be interconverted. PF3 is shown to be a slightly weaker 7r-acceptor than CO. Selected results on nuclear-spin spin coupling constants, 13 C and 31 P shielding are also presented. 
  Reference    Z. Naturforsch. 37b, 631—645 (1982); eingegangen am 25. November 1981 
  Published    1982 
  Keywords    Carbonylphosphinevanadium, Carbonylphosphineniobium, Carbonylphosphinemanganese, NMR Spectra 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0631.pdf 
 Identifier    ZNB-1982-37b-0631 
 Volume    37 
2Author    Wolf-Walther Du Mont, Mario GrenzRequires cookie*
 Title    Bis(trimethylsiloxy)tin(II): A Heterosiloxane as Soft Ligand  
 Abstract    Contrary to earlier reports the reaction of sodium trimethylsilanolate with stannous chlo-ride does not yield bis(trimethylsiloxy)tin(II) (1) but a polynuclear compound of the type Sn20(0SiMe3)2 (2). 1 is obtained from the reac-tion of stannocene with trimethylsilanole. The compound is a dimer that gives rapid exchange reactions of terminal and bridging trimethylsil-oxy groups in inert organic solvents. 
  Reference    (Z. Naturforsch. 38b, 113—114 [1983]; eingegangen am 10. September 1982) 
  Published    1983 
  Keywords    Oxastannylenes, Heterosiloxanes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0113_n.pdf 
 Identifier    ZNB-1983-38b-0113_n 
 Volume    38 
3Author    Gilbert Brands, Alfred GollochRequires cookie*
 Title    Schwefel-Stickstoff-Verbindungen, XII [1] 19 F-NMR-und 13 C-NMR-spektroskopische Untersuchung einiger aromatisch substituierter Schwefeldiimide Sulfur-Nitrogen Compounds, XII [1] 19 F NMR and 13 C NMR Spectroscopic Investigation of Some Aromatic Substituted Sulfurdiimides  
 Abstract    i»F NMR and «C NMR spectra of the sulfur(IV)diimines R1-NSN-R2 (Ri/2 = C6H5, C6F5, C6H5S, C6F5S) and the corresponding N-sulfinylamines R!/ 2 -NSO are discussed. Chemical shifts are correlated to the electron withdrawing properties of the substituents. 
  Reference    Z. Naturforsch. 38b, 326—331 (1983); eingegangen am 20. September/7. Dezember 1982 
  Published    1983 
  Keywords    Sulfurdiimines, N-Sulfinylamines, NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0326.pdf 
 Identifier    ZNB-1983-38b-0326 
 Volume    38 
4Author    ReinerM. Artens++, W. Olf-W, Alther, M. Ont, Lutz LangeRequires cookie*
 Title    Trichlorsilylierung sperriger Dialkylchlorphosphane und Tetraalkyldiphosphane mit HexachlordisiIan+ Trichlorosilylation of Bulky Dialkylchlorophosphanes and Tetraalkyldiphosphanes with Hexachlorodisilane  
 Abstract    Chlorodiisopropylphosphane reacts with hexachlorodisilane to give diisopropyl(tri-chlorosilyl)phosphane which reacts with the educt chlorophosphane to produce tetraisopro-pyldiphosphanc. Tetraisopropyldiphosphane reacts with hexachlorodisilane to provide diiso-propyl(trichlorosilyl)phosphane. With di-/m-butylchlorophosphane and tetra-/e/7-butyldi-phosphane, the corresponding reactions leading to dW£>/7-butyl(trichlorosilyl)phosphane are much slower; while the product does not react further with di-/e/7-butylchlorophosphane, it does with chlorodiisopropylphosphane. A stable 1 : 1 complex is formed from di-tert-butyl(trichlorosilylphosphane) with silver bromide. Products are characterized on the basis of analytical and 'H, l3C, 29Si and 3IP NMR data. 
  Reference    Z. Naturforsch. 46b, 1609—1612 (1991); eingegangen am 3. Juli 1991 
  Published    1991 
  Keywords    Trichlorosilylation, Chlorophosphanes Silylphosphanes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/46/ZNB-1991-46b-1609.pdf 
 Identifier    ZNB-1991-46b-1609 
 Volume    46 
5Author    Jörn Müller, PetraEscarpa Gaede, Ke QiaoRequires cookie*
 Title    ^-Olefin-Iridium-Komplexe, XXII [1] C -H -Aktivierung von aromatischen und aliphatischen Solvensmolekülen RH bei der Reaktion von [Cp*IrCI2 ] 2 mit Butadienmagnesium unter Bildung von [Cp*Ir(773-C4H 7)R] sowie Kristallstruktur von [Cp*Ir(i/3-C4H 7)C6H 5] jr-Olefin Iridium Complexes, XXII [1] C -H Activation of Aromatic and Aliphatic Solvent Molecules RH in the Reaction of [Cp*IrCl2 ] 2 with Butadienemagnesium with Formation of [Cp*Ir(?;3 -C4 H 7 )R], and Crystal Structure of [Cp*Ir(773 -C4 H 7 )C6 H 5] Activation of C -H , (l-Methylallyl)(pentamethylcyclopentadienyl)iridium-a-organyl Com­ plexes  
 Abstract    Reactions of [Cp*IrCl2]2 (Cp* = ^3-C5M e5) with [MgC4H6 -2 THF]" at low temperature give [Cp*Ir(^4-C4H6)] together with [Cp*Ir(/73-C4H 7)R] compounds, the latter being formed via C -H activation of solvent molecules RH (RH = benzene, toluene, anisole, thiophene, furane, N-methylpyrrole, pentane, cyclohexane. THF). In the case of pyrrole, C -N -activation occurs. The ratio of syn and anti isomers of the 1-methylallyl com plexes as well as the sites o f C -H activation of RH were investigated by NM R spectrometry. An enantiomorphous crystal of [Cp*Ir(773-C4H7)C6Hs] was characterized by X-ray diffraction analysis which reveals trigonal planar coordination at the Ir atom and an exo, syn conformation o f the 1-methylallyl ligand. A mechanism of the reaction which involves 16-electron intermediates is discussed. The corresponding system [Cp*RhCl2]2/butadienemagnesium/RH gives only [Cp*Rh(>/4-C4H6)], and no C -H activation is observed. 
  Reference    Z. Naturforsch. 49b, 1645—1653 (1994) 
  Published    1994 
  Keywords    Synthesis, NMR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1645.pdf 
 Identifier    ZNB-1994-49b-1645 
 Volume    49 
6Author    Ekkehard Lindner, Günter Von AuRequires cookie*
 Title    Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, VII [1] Heterolytische Spaltung der Re-Re-Bindung in den Zweikern-Anionen [(OC)4ReP(R2 )0] 2 2 ~ mit Elektrophilen - ein Weg zu Heterocyclen mit Re-C-o-Bindung Preparation and Properties of, and Reactions with, Metal-Containing Heterocycles, VII [1] Heterolytic Cleavage of the Re-Re Bond in the Binuclear Anions [(0C)4ReP(R2)0]2 2_ with Electrophiles -a Pathway to Heterocycles with Re-C a Bonds  
 Abstract    The preparation of the six-membered rhenacyclohexanes (OC)4ReP(R2)OCH2C(CH3)2CH2 (la, b) [R = CH3 (a), C6H5 (b)J is accomplished by heterolytic cleavage of the Re-Re bond in the binuclear anions [(0C)4ReP(R2)0]2 2 -with strong electrophiles like the alkane-diylbis(triflate) (CH3)2C(CH2Y)2 (Y= OSO2CF3), followed by an attack of the a>-positioned carbenium-like C atom on the phosphinite oxygen of the anion. 1 a, b insert SO2 under ring I I 
  Reference    Z. Naturforsch. 35b, 1104—1110 (1980); eingegangen am 9. Mai 1980 
  Published    1980 
  Keywords    Rhenacyclohexanes, Mechanism, S02-Insertio", X-ray, IR spectra, NMR spectra : 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1104.pdf 
 Identifier    ZNB-1980-35b-1104 
 Volume    35 
7Author    K. Barlos, Heinrich NöthRequires cookie*
 Title    Beiträge zur Chemie des Bors, CVIII [1] Synthese und Konformation yon N.N'-Bis(boryl)-N.N'-dimethylhydrazinen Contributions to the Chemistry of Boron, CVIII [1] Synthesis and Conformation of N,N , -Bis(boryl)-N,N'-dimethylhydrazines N,N'-Bis(methylboryl)-N,N'-dimethyl-hydrazine, N,N'-Bis(dichlor-boryl)-N,N  
  Reference    (Z. Naturforsch. 35b, 125—132 [1980]; eingegangen am 10. August 1979) 
  Published    1980 
  Keywords    -dimethyl-hydrazine, Conformation, NMR Spectra, PE Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0125.pdf 
 Identifier    ZNB-1980-35b-0125 
 Volume    35 
8Author    Herbert Meier, Hansjörg Gugel, Margret Barth, Udo PlückenRequires cookie*
 Title    Konformationsuntersuchungen an benzokondensierten Achtringen Conformation Analysis of Benzo-Condensed Eight-Membered Rings  
 Abstract    The annellation of 1-4 benzene rings to carbocyclic 8-rings increases stepwise the activation barrier for the ring inversion. A drastic consequence of the steric hindrance in the transition state is the rigidity of 9,10-dihydro-tribenzo[a,c,e]cyclooctenes at room temperature. With the aid of a complete analysis of the iH NMR spectra a decision is possible between fixed C2-conformations (e.g. 8) and Cs-conformations (e.g. 9). 
  Reference    Z. Naturforsch. 35b, 477—481 (1980); eingegangen am 13. Dezember 1979 
  Published    1980 
  Keywords    Ring Inversion, NMR Spectra, Lanthanoid Shift Measurements 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0477.pdf 
 Identifier    ZNB-1980-35b-0477 
 Volume    35 
9Author    Herbert Schumann, Manfred MeissnerRequires cookie*
 Title    Organometallphosphin-substituierte Übergangsmetallkomplexe, XXVI [1] Diearbonyl-nitrosyl-organometaUphosphin-kobalt-Komplexe Organometalphosphine-Substituted Transition Metal Complexes, XXVI [1] Dicarbonyl Nitrosjd Organometal Phosphine Cobalt Complexes  
 Abstract    The reactions of tricarbonyl nitrosyl cobalt with tri-feri-butylphosphine, di(teri-butyl)-trimethylsilyl-, -germyl-, -stannylphosphine, £er£-butyl-bis(trimethylsilyl)-, -(germyl)-, -(stannyl)phosphine, as well as with tris(trimethylsilyl)-, -(germyl)-, and -(stannyl-phosphine result in the elimination of one CO-ligand and the formation of corresponding dicarbonyl-nitrosyl-organometal phosphine cobalt complexes. The NMR spectra of the products are reported and discussed. 
  Reference    Z. Naturforsch. 35b, 594—598 (1980); eingegangen am 5. Dezember 1979 
  Published    1980 
  Keywords    Organometal Phosphines, Dicarbonyl-nitrosyl Cobalt Complexes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0594.pdf 
 Identifier    ZNB-1980-35b-0594 
 Volume    35 
10Author    W. PetzRequires cookie*
 Title    Darstellung von Eisentetracarbonylkomplexen mit Thioacetamiden als Liganden Preparation of Iron Tetracarbonyl Complexes with Thioacetamides as Ligands  
 Abstract    The thioacetamids S = C(CH3)(NHR) (R = H, la; R = Ph, lb) react with Fe2(CO)9 to form the iron tetracarbonyl complexes 2 and 3 with S-bonded ligands. IR, X H, 13 C and mass spectra of these new compounds are reported. 
  Reference    Z. Naturforsch. 35b, 860—862 (1980); eingegangen am 17. März 1980 
  Published    1980 
  Keywords    Iron Carbonyl Complexes, Thioacetamid Ligands, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0860.pdf 
 Identifier    ZNB-1980-35b-0860 
 Volume    35 
11Author    Werner Zeiß, Wolfgang Schwarz, Heinz HessRequires cookie*
 Title    995  
 Abstract    W. Zeiß et al. • (MePNMe)4S3, ein Cyclotetra(A 3 ,A 5 ,A 5 ,A 5 -phosphazan) (MePNMe)4S3, a Cyclotetra(A 3 ,A 5 ,A 5 ,A 5 -phosphazane) 31 P} Decoupling Octamethylcyclotetra(A 3 -phosphazane) (1) reacts with three mole equivalents of sulfur, added either in excess or in deficite, to give 2, the first cyclotetra(A 3 ,A 5 ,A 5 ,A 5 -phosphazane). Its crystal structure determination shows a completely unsymmetrical molecule, which does not undergo ring inversion in solution. Thus an ABMX spin system with remarkably different AM and BM coupling constants is observed in the 31 P{ 1 H} NMR spectrum. By means of selective { 31 P} decoupling, all CH3 proton signals could be assigned in the 1 H NMR spectrum. 
  Reference    Z. Naturforsch. 35b, 959—963 (1980); eingegangen am 29. Februar 1980 
  Published    1980 
  Keywords    Cyclotetraphosphazane, Crystal Structure, NMR Spectra, Selective { 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0959.pdf 
 Identifier    ZNB-1980-35b-0959 
 Volume    35 
12Author    C. Cnossen-Voswijk, J. C. Van De Grampel, C. KrukRequires cookie*
 Title    Derivatives of cis-NPCl2(NSOCl)2 and (NPC12)2NS0C1, Part XV [1] Methyl-and Ethylamino Derivatives of (NPCl2)2NSOPh  
 Abstract    The aminolysis of (NPCl2)2NSOPh by methyl-and ethylamine in diethylether proceeds mainly via a non-geminal substitution pattern. In acetonitrile both geminal and non-geminal substitution is observed. The preparation of the derivatives is described and the iH and 31 P NMR data are discussed. The interpretation of the NMR spectra is supported by the simulation of the spectra of NPClNHMeNPCl2NSOPh. 
  Reference    Z. Naturforsch. 35b, 1559—1564 (1980); received August 11 1980 
  Published    1980 
  Keywords    Ethylamino Derivatives, Methylamino Derivatives, NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1559.pdf 
 Identifier    ZNB-1980-35b-1559 
 Volume    35 
13Author    Peter Dehnert, Joseph Grobe, Due Le VanRequires cookie*
 Title    Perfluormethyl-Element-Liganden, XXTV [I]* Organozinnverbindungen als Reagenzien, DI [2] Spaltungsreaktionen der Element-Element-Bindung in Verbindungen des Typs RnE-ERTO (R = CH3, CF3-E =P, AS, Se, Te * n,m = l, 2)  
 Abstract    A systematic study of the cleavage of element-element bonds in compounds of the type R"E-ERm (R = CH3, CF3; E = P, As, S, Se, Te; n,m = 1, 2) by the group IV A element hydrides Me3M'H (M' = Si, Ge, Sn; Me — CH3) has been carried out. To evaluate the reaction pathway, for a number of compounds the attack of H2O, CH3OH, HBr and HI has been investigated. Possible reaction intermediates have been synthesized by in-dependent routes and tested under comparable conditions. 
  Reference    (Z. Naturforsch. 36b, 48—54 [1981]; eingegangen am 14. August 1980) 
  Published    1981 
  Keywords    Organoelement-Element Compounds, Perfluoromethyl Derivatives, NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0048.pdf 
 Identifier    ZNB-1981-36b-0048 
 Volume    36 
14Author    W. PetzRequires cookie*
 Title    Über die Reaktion von [(C0)4FeC(0)NMe2]-[C(NMe2)3] + mit einigen Diorganylbromboranen On the Reaction of [(C0)4FeC(0)NMe2]-[C(NMe2)3 + with Some Diorganoboron Bromides  
 Abstract    The carbamoyl complex [(C0)4FeC(0)NMe2][C(NMe2)3] (1) reacts with boron halides of the type BrBR2 (R = Me, Ph, NMe2) at low temperature to give the boroxycarben com-plexes 2, which decompose at ambient temperature to the aminoboranes 3 and Fe(CO)s. The NMR and IR spectra of the new compounds 2 are reported. 
  Reference    Z. Naturforsch. 36b, 335—338 (1981); eingegangen am 12. November 1980 
  Published    1981 
  Keywords    Boroxycarben Ligands, Iron Carbonyl Complexes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0335.pdf 
 Identifier    ZNB-1981-36b-0335 
 Volume    36 
15Author    Willy GomblerRequires cookie*
 Title    NMR-spektroskopische Untersuchungen an Chalkogenverbindungen, II [1] 12o Te-, 77 Se-, 19 F-und 13 C-chemische Verschiebungen von CF3-substituierten Selen-und Tellurverbindungen [2] NMR Spectroscopic Studies on Chalcogen Compounds, II [1] 125 Te, 77 Se, »F and * 3 C Chemical Shifts of CF3 Substituted Selenium and Tellurium Compounds [2]  
 Abstract    77 Se chemical shifts of compounds CF3SeX exhibit an extraordinary good linear correla-tion with Huggins' electronegativities of X, %x-A range of 1051 ppm is covered for yx values between 1.9 and 3.15. Effective electronegativities are derived from the <5(77 Se) values. For some compounds unexpected 77 Se chemical shifts are found. This indicates an uncommon electronic constitution at selenium. Electron excitation energies are reported for some of the compounds and their importance for the paramagnetic shielding term is discussed. The relative shieldings of the tellurium compounds are analogous to those of the corresponding selenium compounds. In contrast to 77 Se, the 19 F shieldings of CF3EX compounds (E = chalcogen) depend inversely on the electronegativity of E and X. The 13 C chemical shifts do not correlate with the xx values. NMR data of some CF3Se(IV) and CF3Te(IV) compounds are also reported for comparison. 
  Reference    Z. Naturforsch. 36b, 535—543 (1981); eingegangen am 21. Januar 1981 
  Published    1981 
  Keywords    NMR Spectra, Trifluoromethyl Group, Selenium, Tellurium 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0535.pdf 
 Identifier    ZNB-1981-36b-0535 
 Volume    36 
16Author    -), Cyclotetra, Phosphazane, Werner Zeiß, Tino Kuhn, Dieter Lux, Wolfgang Schwarz, Heinz HessRequires cookie*
 Title    (MePNMe)4 Mel und (MePNMe)4 2 Mel, ein Cyclotetra(A 3 .A 3 .A 3 .A 5 -) und ein Cyclotetra(A 3 .A 5 .A 3 .A 5 -phosphazan) (MePNMe)4 * Mel and (MePNMe)4 * 2 Mel, a Cyclotetra  
 Abstract    (2) with three P 111 and one P v , and (3) with two P In and P v atoms are prepared from 1 with methyl iodide. NMR spectra of 2 are compared with those of the recently prepared [1] 4. The crystal structure of 3 shows the molecule to have a crystallographic inversion centre. Thus cis-trans isomerisation must have taken place during the working up procedure. Alkylation has severe consequences on bond distances and bond angles of the cyclotetraphosphazane ring system, in contrast to M(CO)s complexation at the same positions as shown in a similar case recently [8]. 
  Reference    Z. Naturforsch. 36b, 561—565 (1981); eingegangen am 9. Dezember 1980 
  Published    1981 
  Keywords    Cyclotetraphosphazanes, NMR Spectra, Crystal Structure Cyclotetraphosphazanes 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0561.pdf 
 Identifier    ZNB-1981-36b-0561 
 Volume    36 
17Author    Ertugrul Arpac, Lutz DahlenburgRequires cookie*
 Title    Oligophosphin-Liganden, III [1] Bis(3-diphenylphosphinopropyl)phenylphospbinchloroiridium(I) * * und dessen Carbonyl-und Hydridderivate Oligophosphine Ligands, III [1] Bis(3-diphenylphosphinopropyl)phenylphosphinechloroiridium(I) and its Carbonyl and Hydride Derivatives  
 Abstract    The title complex, IrCl(bdpp) (1), where bdpp = PhP[(CH2)3PPh2]2, has been obtained from [IrCl(C8Hi4)2]2 and the triphosphine ligand. Characteristic 31 P NMR data of 1 dissolved in THF are <5(PPh2) = 2.7 and <3(PPh) = —19.9 with cis-2 J(PIrP) = 32.8 Hz. Reaction of 1 with CO proceeds stepwise to yield five-coordinate IrCl(CO)(bdpp) (2) and ionic [Ir(CO)2(bdpp)]Cl (3). A trigonal bipyramidal geometry with equatorial CO ligands is assigned to the cation of 3 on the basis of its v(CO) infrared intensities. When allowed to react with HCl, 1 gives the monohydride IrHCl2(bdpp) (4). Similarly, the dihydride IrH2Cl(bdpp) (5) is formed from 1 and H2. As has been established by IR and NMR spectroscopy, 4 and 5 adopt cis-wer-octahedral structures. 
  Reference    Z. Naturforsch. 36b, 672—676 (1981); eingegangen am 9. März 1981 
  Published    1981 
  Keywords    Bis(3-diphenylphosphinopropyl)phenylphosphine, Iridium Complexes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0672.pdf 
 Identifier    ZNB-1981-36b-0672 
 Volume    36 
18Author    Römer, H. Scholl, H. Budzikiewicz, H. Korth, G. PulvererRequires cookie*
 Abstract    The structure elucidation of several minor phenazine pigments of Pseudomonads is described. 4-Hydroxyphenazine-l,6-dicarboxylic acid dimethyl ester, 2,3-dihydroxy-phenazine, 2,3,7-trihydroxyphenazine, 4-hydroxyphenazine-l-carboxylic acid, 2,3-di-hydroxyphenazine-l-carboxylic acid, 2,6-dihydroxyphenazine-l-carboxylic acid and 2,3,7-trihydroxyphenazine-l,6-dicarboxylic acid are new phenazine derivatives. The distribu-tion of phenazines in the genus Pseudomonas is investigated. 
  Reference    Z. Naturforsch. 36b, 1037—1046 (1981); eingegangen am 27. März 1981 
  Published    1981 
  Keywords    Phenazines, Bacterial Constituents, Pseudomonads, NMR Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1037.pdf 
 Identifier    ZNB-1981-36b-1037 
 Volume    36 
19Author    Trimethylsilyl Tetrafluorotellurates, Vi, Benno Bildstein, Walter Tötsch, Fritz Sladky, E-F=. Me, E-RRequires cookie*
 Title    Trimethylsüyl-tetrafluorotellurate(VI)  
 Abstract    The interaction of MesSiCl with eis-and trans-(HO)2TeF 4 and eis-and £ran.s-HOTeF 4 OCH 3 yields eis-and trans-(Me3SiO)2TeF 4 and eis-and <rans-Me3SiOTeF 4 OCH3, respectively, which have been characterized by NMR spectroscopy (125 Te, 29 Si, 19 F, X H). Die Trimethylsilylgruppe ist eine häufig verwen-dete Abgangsgruppe in Reaktionen mit Fluoriden: 
  Reference    Z. Naturforsch. 36b, 1542—1543 (1981); eingegangen am 22. Juli 1981 
  Published    1981 
  Keywords    Synthesis, Trimethylsilyl Tetrafluorotellurates(VI), NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1542.pdf 
 Identifier    ZNB-1981-36b-1542 
 Volume    36 
20Author    Edgar Niecke, Anke Nickloweit-Lüke, Reinhold Rüger, Bernt Krebs, Helmut GreweRequires cookie*
 Title    .2A 3 .3A 3 -Azadiphosphiridine -Synthese, Kristallstruktur und Eigenschaften 1,2 A 3 ,3 x 3 -Azadiphosphiridines -Synthesis, Crystal Structure and Proj)erties  
 Abstract    1,2 A 3 ,3 A 3 -Azadiphosphiridines are avaüable by elimination of hydrogenhalide from ß-and y-functional molecular frameworks and by 1 + 2 cycloaddition of phosphinidenes towards aminoiminophosphanes. In contrast to other three-membered phosphorus com-pounds, azadiphosphiridines decompose by 2 +1 cycloreversion to aminoiminophosphanes and phosphinidenes. The molecular structure of an azadiphosphiridine demonstrates the trans arrangement of the exocyclic ligands and the planarity of the endocyclic nitrogen. 
  Reference    Z. Naturforsch. 36b, 1566—1574 (1981); eingegangen am 13. Juli 1981 
  Published    1981 
  Keywords    Azadiphosphiridines, Cyclisation, Thermal Decomposition, NMR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1566.pdf 
 Identifier    ZNB-1981-36b-1566 
 Volume    36