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101Author    H.-R SchultenRequires cookie*
 Abstract    A combined 13 C nuclear magnetic resonance and field desorption mass spectrometric investigation of algae grown on 13 C02 has shown that the isotopic enrichment of amino acids extracted therefrom is neither uniform nor statistical. The use of these two indepen-dent techniques allows a new, detailed and accurate insight into the label distribution resulting from biosynthesis. The observed deviations from the statistical abundances are systematic. A system for classifying each member of the complex ensemble of isotopic species has been devised, so that the isotopomers may be ordered according to their relative probability of occurrence. 
  Reference    Z. Naturforsch. 36b, 1289—1296 (1981); received May 20 1981 
  Published    1981 
  Keywords    13 C Enriched Amino Acids, Biosynthesis, Label Distribution, NMR Spectra, Field Desorption Mass Spectrometry 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1289.pdf 
 Identifier    ZNB-1981-36b-1289 
 Volume    36 
102Author    PeterM. Kaiser®, Reinhard Nesper, Karl-Friedrich Tebbe, Herbert Witzel»-Requires cookie*
 Title    Pyridin-4-on-Nueleosid + : Stabilisierung der Struktur im Kristall und in wäßriger Lösung Pyridine-4-on Nucleoside: Stabilisation of the Structure in the Crystal and in Aqueous Solution  
 Abstract    C10H13NO5 • H2O is monoclinic, space group P2i with a = 773.7 pm, b = 814.6 pm, c= 932.6 pm, ß = 109.36° at 143 K, Z = 2. The crystal structure has been refined to R =0.031 with 1340 counter reflections. Features of this nucleoside include an orientation of the base at the glycosidic bond N(l)-C(l') in the anii-range (52.5°), a ribosyl moiety in the C(2')-endo(S) conformation and in contrast to many other nucleosides a trans arrange-ment at C(4')-C(5'). This unusual conformation is stabilized by a distinct H-bonding scheme including the water molecule and the oxygen of the adjacent pyridin-4-on ring system. NMR data indicate on the other side that in solution the conformation of the nucleoside is anti/g + similar to that of other pyrimidine nucleosides. The 5'-OH group replaces the water molecule in the crystal. The preferred anti position of the base cannot be explained by an interaction of H(2,6) of the base with the 5'-OH group or the C(4) oxygen. Both protons which couple with H(3,5) coalesce in a single sharp doublet. Water entropy seems to be the decisive factor for the stabilization of the anti/g+ conformation in aqueous solution. 
  Reference    Z. Naturforsch. 36b, 1632—1639 (1981); eingegangen am 3. Juli 1981 
  Published    1981 
  Keywords    Pyridine-4-on Nucleoside, X-ray, NMR Spectra, Conformational Differences, Water Entropy 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1632.pdf 
 Identifier    ZNB-1981-36b-1632 
 Volume    36 
103Author    Henri Brunner, MonikaE. Dylla, GabrieleA M Hecht, Willigis PieronczykRequires cookie*
 Title    Synthese von ß-Diphenylphosphin-carbonyl-Verbindungen durch Umsetzung von Brommethyl-earbonyl-Verbindungen mit Diphenyl(trimethylsilyl)phosphin Synthesis of /9-Diphenylphosphine-carbonyl Compounds by Reaction of Bromomethyl-carbonyl Compounds with Diphenyl(trimethylsilyl)phosphine  
  Reference    Z. Naturforsch. 37b, 404—406 (1982); eingegangen am 13. November 1981 
  Published    1982 
  Keywords    /3-Keto-phosphines, Amino-phosphines, Imino-phosphines, Synthesis, NMR Spectra, Optical Activity 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0404.pdf 
 Identifier    ZNB-1982-37b-0404 
 Volume    37 
104Author    Borislav Bogdanović, Martin Rubach, Klaus SeevogelRequires cookie*
 Title    ?f-Allyl-hydrogensulfidopalladium-und -platin-Komplexe ?7 3 -Allylmetal-Sulfur Complexes, IV [1] ?y 3 -A]lyl-hydrogensulfidopalladium and -platinum Complexes  
  Reference    Z. Naturforsch. 38b, 592—598 (1983); eingegangen am 28. Dezember 1982 
  Published    1983 
  Keywords    r/ 3 -Allyl-hydrogerisulfklopalladium Complexes, r/ 3 -Allyl-hydrogensulfidoplatinum Complexes, IR Spectra, Raman Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0592.pdf 
 Identifier    ZNB-1983-38b-0592 
 Volume    38 
105Author    Jörn Müller, Rainer Stock, Joachim PickardtRequires cookie*
 Title    Complex Formation of Rhodium with 6.6-Dimethylfulvene  
 Abstract    Reaction of [(nbd)RhCl]2 (nbd = nor bornadiene) with CH3Li and 6.6-dimethylfulvene yields (nbd)Rh(2-propenylcyclopentadienyl). (cod)Rh(Cl)P(CH3)3 (cod = 1.5-cycloocta-diene), obtained by cleavage of [(cod)RhCl]2 with P(CH3)3, reacts with 6.6-dimethyl-fulvene and CH3Li or i-C3Ü7MgBr with substitution of cod by dimeric fulvene ligands the nature of which depends on the alkyl reagent. The new complexes were characterized by NMR spectra and in one case by X-ray diffraction analysis. 
  Reference    Z. Naturforsch. 38b, 1454—1459 (1983); eingegangen am 28. Juni 1983 
  Published    1983 
  Keywords    Rhodium Complexes with Monomeric and Dimeric Fulvene Ligands, Synthesis, NMR Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1454.pdf 
 Identifier    ZNB-1983-38b-1454 
 Volume    38 
106Author    Jochen Ellermann, AlfonsA M DemuthRequires cookie*
 Title    Chemistry of Poly functional Molecules, 75 [1] The Reaction of 5-Bromo-uracil with Sodium Diphenylphosphide  
 Abstract    5-Bromo-uracil (1) reacts with sodium diphenylphosphide or a mixture of sodium diphenylphosphide and sodium amide in liquid ammonia to give sodium 5-bromo-uracilate (5 a). From water 5 a crystallizes with one mole H2O yielding 5b. Treatment of 5 a with D2O yields sodium 5-bromo-N-deutero-uracilate-D20 (1/1) (5 c). With chlorodiphenyl-phosphine 5a forms 1-diphenylphosphino-uracil (2). 5a, b, c show N(l)-N(3)-(H/D)-tauto-merism in concentrated D2O solutions already, but in DMSO or Dö-DMSO only in dilute solutions. All the compounds were characterized by infrared, Raman, X H NMR, UV spectra and conductometry. 
  Reference    Z. Naturforsch. 38b, 1568—1574 (1983); eingegangen am 6. Juni/2. August 1983 
  Published    1983 
  Keywords    Sodium 5-Bromo-uracilates, Deutero Derivatives, Tautomerism, NMR Spectra, UV Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1568.pdf 
 Identifier    ZNB-1983-38b-1568 
 Volume    38 
107Author    Udo Kunze, Andreas BrunsRequires cookie*
 Title    Phosphinsubstituierte Chelatliganden, XII [1] Metallinduzierte E/Z-Isomerisierung an Rheniumcarbonyl-Komplexen mit Phosphinothioformamid-und -thioformimidat-Liganden Phosphine-Substituted Chelate Ligands, XII [1] Metal-Induced E/Z-Isomerisation of Rheniumcarbonyl Complexes with Phosphino- thioformamide and -thioformimidate Ligands  
 Abstract    The coordination of tertiary phosphinothioform-amides and the isomeric S-alkyl phosphinothioform-imidates to BrRe(CO) 5 gives the /ac-bromotricar-bonylrhenium complexes la, b and 2a, b with P,S-chelate ligands. Unlike the analogous manganese complexes, the NMR spectra of dissolved lb and 2a, b show a splitting of the N-alkyl ('H, 13 C) and phosphorus signals indicating E/Z isomerisation of the ligands. 
  Reference    (Z. Naturforsch. 40b, 127—128 [1985]; eingegangen am 7. August/5. September 1984) 
  Published    1985 
  Keywords    E/Z-Isomerisation, NMR Spectra, Rhenium Complexes, Tertiary Phosphinothioform-amides, S-Alkyl Phosphinothioformimidates 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0127_n.pdf 
 Identifier    ZNB-1985-40b-0127_n 
 Volume    40 
108Author    Dieter Hellwinkel, Peter Ittemann, Siegbert BohnetRequires cookie*
 Title    Dibenzo  
 Abstract    [b,g]heterocin-5,7-dione Dibenzo[b.g]heterocine-5,7-diones 
  Reference    Z. Naturforsch. 40b, 858—859 (1985); eingegangen am 13. Februar 1985 
  Published    1985 
  Keywords    Dibenzo[b, g]heterocine-5, 7-diones, Synthesis, NMR Spectra, Stereochemistry, Ring Inversion 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0858_n.pdf 
 Identifier    ZNB-1985-40b-0858_n 
 Volume    40 
109Author    W. Erner, M. Artin, E. Bner, W. Erner BertleffRequires cookie*
 Title    CS2, CSSe und CSe2 als Bausteine für ein-und zweikernige Palladium-und Platinkomplexe [1] CS2, CSSe and CSe2 as Building Blocks for Mono-and Binuclear Palladium and Platinum Complexes [1] H elm ut  
  Reference    Z. Naturforsch. 40b, 1351 (1985); eingegangen am 11. Juni 1985 
  Published    1985 
  Keywords    Mononuclear Phosphanepalladium Complexes, NMR Spectra, Binuclear Complexes, Bridging Heteroallenes C EE', Zwitterions PR3CEE' as Ligands 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-1351.pdf 
 Identifier    ZNB-1985-40b-1351 
 Volume    40 
110Author    Lutz Dahlenburg, Constanze Prengel, Nils HöckRequires cookie*
 Title    Oligophosphan-Liganden, XX [1] Reduktion von C 0 2 am Trisphosphanrhodium(I)-Komplex RhCl[f-BuP(CH2CH2CH2PMe2)2] Oligophosphine Ligands, X X [1] Reduction of Carbon D ioxide by the Trisphosphinerhodium (I) Complex RhCl[r-BuP(CH2CH2CH2PM e2)2]  
  Reference    Z. Naturforsch. 41b, 718—721 (1986); eingegangen am 28. Februar 1986 
  Published    1986 
  Keywords    C arbon Dioxide, Bis(3-dim ethylphosphinopropyl)fm -butylphosphine, Rhodium Complexes, NMR Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0718.pdf 
 Identifier    ZNB-1986-41b-0718 
 Volume    41 
111Author    Udo Kunze, Rolf TittmannRequires cookie*
 Title    Phosphinsubstituierte Chelatliganden, XXIII [1] Darstellung und NMR-Spektren von Alkyl-arylphosphinothioformamiden, R(Ph)PC(S)NHMe Phosphine-Substituted Chelate Ligands, XXIII [1] Synthesis and NMR Spectra of Alkyl-arylphosphinothioformamides, R(Ph)PC(S)NHMe  
 Abstract    A series of alkyl-arylsubstituted N-methyl phosphinothioformamides, R(Ph)PC(S)NHMe (2 a—g), with varying bulkiness of the alkyl rest was synthesized from the racemic secondary phosphines la—g and methyl isothiocyanate. 'H and 13 C NMR spectra of 2a—g reveal signal sets of diastereotopic nuclei due to the asymmetry of the molecule. The chemical shift and coupling constants were confirmed by simulation in case of 2b, c. The vicinal 31 P— 13 C cou-plings of the menthyl and neomenthyl compounds 2f, g show an "anti-Karplus" behaviour CJ(gauche) > ? J(trans)) and allow the conformational assignment of the alicyclic group. The 31 P chemical shifts of 2a—d give a linear correlation with the cone angle of the alkyl substituents quoted from literature. 
  Reference    (Z. Naturforsch. 42b, 77—83 [1987]; eingegangen am 8. August 1986) 
  Published    1987 
  Keywords    Alkyl-arylphosphinothioformamides, Menthyl and Neomenthyl Derivatives, NMR Spectra, Conformational Analysis, Substituent Influence 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0077.pdf 
 Identifier    ZNB-1987-42b-0077 
 Volume    42 
112Author    Franjo Gol, Gerd Hasselkuß, PeterC. Knüppel, Othmar StelzerRequires cookie*
 Title    Lineare Oligophosphaalkane, XX [1] Alkalimetall-und Trimethylsilylderivate PH-funktioneller Methylenbisphosphane Linear Oligophosphaalkanes, XX [1] Alkali Metal and Trimethylsilyl Derivatives of PH-Functional Methylenebisphosphanes  
 Abstract    The synthesis of the trimethylsilyl derivatives of the PH-functional methylenebisphosphanes, R 2 ^"(Me 3 Si)"P—CH 2 —PR(SiMe 3) (R = Me. /Pr. tBu. Ph. 2.4.6-Me 3 C (,H 2 ; n = 0. 1) is reported. In the Li-phosphides R 2 _"Li"P — CH 2 — PUR used as reactive intermediates, a monomer-oligomer association equilibrium causes a rapid Li-exchange as indicated by the solvent and temperature dependent ^PI'H} and 7 Li NMR spectrum of (/Pr) 2 P-CH 2 -P(/Pr)Li in various solvents (Et : 0. THF and MTHF) in the temperature range from 30 to -110 °C. For the syntheses of the Me-and Ph-substituted PH-functional methylenebisphosphanes R 2 P-CH 2 -PRH and RHP-CH 2 -PRH (R = Me, Ph) the chlorophosphane CKP —CH 2 —PC1 2 is used as a starting material. Bifunctional substituents (Ph —N—N —Ph and Me —N—CO —N—Me) are employed for the first time as protect-ing groups to block one or two PCl-functions in C1T—CIL—PCI-,. Cleavage of the PN-bonds in the five membered ring systems RP-CH 2 -PR-N(Ph)-N (Ph) (R = Me. Ph) with HCl affords the P-substituted methylenebis-chlorophosphanes RC1P—CH 2 — PC1R in satisfactory yields. The compounds have been characterized by 'H. I3 C{ 'H} and 3! F*{'H}NMR spectroscopy. With-in homologous substitution series of methylenebisphosphanes, e.g. R 2 P—CH 2 —PR 2 _"H" the coupling constants 2 /(PP) seem to reflect conformational changes at the PCP-skeleton. 
  Reference    (Z. Naturforsch. 43b, 31—44 [1988]; eingegangen am 15. Juni 1987) 
  Published    1988 
  Keywords    Functional Methylenebisphosphanes Bifunctional Protecting Groups, Lithium and Trimethylsilyl Derivatives, Dynamic Li-Exchange, NMR Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0031.pdf 
 Identifier    ZNB-1988-43b-0031 
 Volume    43 
113Author    Frank Edelmann, Claudia Spang, HerbertW. Roesky, PeterG. JonesRequires cookie*
 Title    Synthese und Struktur des ersten dreigliedrigen Arsen—Phosphor—Platin-Ringes Synthesis and Structure of the First Three-Membered Ring Containing Arsenic, Phosphorus and Platinum  
 Abstract    -butylphenylphosphane reacts with CpFe(C,H4AsCl2) in the presence of DBU to yield CpFe[C5H4As=PC6H2(f-Bu)?l. The reaction of this arsaphosphene with (Ph3P)2PtC2H4 yields CpFe[C5H4As—P[C6H2(r-Bu)3]Pt(PPh3)2], a compound with a three-membered ring containing arsenic, phosphorus and platinum. 
  Reference    Z. Naturforsch. 43b, 517—520 (1988); eingegangen am 5. Januar 1988 
  Published    1988 
  Keywords    X-Ray, NMR Spectra, Phosphorus, Arsenic, Platinum 2, 4, 6-Tri 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0517.pdf 
 Identifier    ZNB-1988-43b-0517 
 Volume    43 
114Author    Roland Köster, Günter SeidelRequires cookie*
 Title    Borverbindungen, LXXXI [1] Neue Organobor-Sulfide — Herstellung und Anwendung Boron Compounds, LXXXI [1] New Organoboron Sulfides — Preparation and Uses  
  Reference    Z. Naturforsch. 43b, 687—693 (1988); eingegangen am 2. Dezember 1987 
  Published    1988 
  Keywords    Bis(l, 5-cyclooctanediylboryl)sulfides, Monosulfide/Disulfide Conversions, Mass Spectra, NMR Spectra, Sulfidation Reagent 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0687.pdf 
 Identifier    ZNB-1988-43b-0687 
 Volume    43 
115Author    Fritz Preuss, Harald Becker, Jürgen Kaub, WilliamS. SheldrickRequires cookie*
 Title    Darstellung und Struktur der zweikernigen tert-Butyliminovanadium(IV)-Komplexe: [('C 4 H 9 N) 2 V 2 Cp 2 X 2 ] (X = 0'C 4 H 9 , Cl) Synthesis and Molecular Structure of the Binuclear terf-Butyliminovanadium(IV) Complexes: [('C 4 H9N) 2 V 2 Cp 2 X 2 ] (X = O f C 4 H 9 , Cl)  
  Reference    Z. Naturforsch. 43b, 1195—1200 (1988); eingegangen am 18. Februar 1988 
  Published    1988 
  Keywords    ferr-Butylimino-cyclopentadienylvanadium(IV) Complexes, Preparation, X-Ray, NMR Spectra, ESR Spectra 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-1195.pdf 
 Identifier    ZNB-1988-43b-1195 
 Volume    43 
116Author    Jörn Müller, Ke Qiao, Regina Schubert, M. Atthias TschampelRequires cookie*
 Title    ;r-01efin-Iridium-Komplexe, XVIII [1] Reaktionen von Bis[cycloocta-l,5-dien-//-chloro-iridium] mit w-Propyllithium in Gegenwart von Alkinen yr-Olefin Iridium Complexes, XVIII [1] Reactions of Bis[cycloocta-l,5-diene-/z-chloro-iridium] with n -Propyllithium in the Presence of Alkynes  
 Abstract    The reaction of [(cod)IrCl]2 (cod = //4-cycloocta-l,5-diene) with n-C3H7Li gives non-isola-ble (cod)IrH species by /3-elimination of (cod)Ir-n-C3H7 intermediates; the stable final prod­ ucts of further reactions with RC = CR highly depend on the nature of the substituents R. With R = Me the 6-endo-H-hexamethylcyclohexadienyl complex 1 is obtained together with the iridacyclopentadienyl compound 2 and known }[(cod)IrH]4C3H4} (3). In case of R = Et steric effects cause transfer of the hydridic hydrogen to the cod ligand, and the hexaethyl-benzene species 4 is isolated which was characterized by crystal structure analysis. The reac­ tion system with tolane again yields a 6-enJo-H-cyclohexadienyl complex (5). In all cases free substituted benzenes are formed as cyclotrimerization products of the alkynes. 
  Reference    Z. Naturforsch. 48b, 1558—1564 (1993); eingegangen am 15. Juli 1993 
  Published    1993 
  Keywords    Substituted Benzene, Cyclohexadienyl and Iridacyclopentadienyl Complexes, Synthesis, NMR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1558.pdf 
 Identifier    ZNB-1993-48b-1558 
 Volume    48 
117Author    JensR. Goerlich, Axel Fischer, PeterG. Jones, Reinhard Schmutzler+Requires cookie*
 Title    Organophosphorverbindungen mit tertiären Alkylsubstituenten. III*: Synthese und Reaktionen Di-l-adamantylsubstituierter Phosphorverbindungen; Kristallstruktur von Di-l-Adamantylphosphinsäurechlorid Organophosphorus Compounds with Tertiary Alkyl Substituents. Ill: Synthesis and Reactions of D i-l-adam antyl-Substituted Phosphorus Compounds; Crystal Structure of Di-l-adam antylphosphinic Chloride  
 Abstract    The reaction of adamantane with PC13/A1C13, followed by hydrolysis, gave (l-Ad)2P(: 0)C1 1, which was converted to (l-Ad)2P(:Ö)F 2 and (l-Ad)2P(:S)Cl 3 by standard procedures. The structure of 1 was confirmed by a single crystal X-ray structure determination; despite the bulky substituents the P-C bond lengths are normal (184.0(3), 185.0(3) pm). Whereas chlorine-fluorine exchange in 3 with AsF3 furnished (l-Ad)2P(: S)F 4, desulfuration of 3 with Ph3P to give (l-Ad)2PCl 5 failed. The secondary phosphine oxides R 'R 2P(:0)H (R1, R2 = 1-Ad: 6; R1 = 1-Ad, R2 = 'Bu: 7; R1, R2 = 'Bu: 8) were synthesized by reaction of 1, l-AdP(:0)Cl2 and 'BuP(:0)Cl2 with 'BuLi. 6 and 8 reacted readily with chloral to give the adducts R2P(:0)CH(0H)CC13 (R = 1-Ad: 9; R = 'Bu: 10). Silylation of 6 with Me2NSiMe3 in the presence of dry air led to (l-Ad)2P(:0)0SiM e3 11, which was hydrolyzed to give (l-Ad)2P (:0)0H 12. (l-Ad)2POSiMe3 13 was obtained by the reaction of 6 with /z-BuLi, followed by Me3SiCl. No reaction took place upon heating 6 with Mo(CO)6. (l-Ad)2PCl 5 was synthesized in low yield by the reaction of 6 with PC13. The action of tetrachloro-o-benzoquinone (TOB) upon 6 furnished (l-Ad)2P(: 0)(o-OH)C6Cl4 15, whereas the 'butyl analogue of 15, 16, was synthesized by hydrolysis of the TOB-adduct of di-'butylfluorophos-phine. Analogous 1-adamantyl-and 'butyl-phosphorus compounds are compared with regard to their 31P NMR data. 
  Reference    Z. Naturforsch. 49b, 801—811 (1994); eingegangen am 17. Dezember 1993 
  Published    1994 
  Keywords    Di-l-adamantyl Phosphorus Compounds, Secondary Phosphine Oxides, Di-l-adamantyl Phosphinic Acid, NMR Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0801.pdf 
 Identifier    ZNB-1994-49b-0801 
 Volume    49 
118Author    Peter Dierkes, Gerlinde Frenzen, Sigrid Wocadlo, W. Erner Massa, Stefan Berger, Jürgen Pebler, Kurt DehnickeRequires cookie*
 Title    Komplexe des Typs [MCl4(SEt2)2] mit M = Mo und W. Kristallstrukturen, NMR-Spektren und magnetisches Verhalten [MCl4(SE t2)2] Complexes with M = Mo and W. Crystal Structures, NMR Spectra, and Magnetic Behaviour  
 Abstract    The crystal structures of the thioether complexes [MCl4(SEt2)2] with M = Mo and W have been solved by X-ray methods. Both compounds crystallize isotypically in the triclinic space group P I with two formula units per cell unit. The metal atoms are octahedrally coordinated by four chlorine atoms and by the two sulfur atoms of the thioether molecules in trans­ position (symmetry Q) with bond lengths (average): M o -C l 233.1, M o -S 253.4, W -C l 233.1, and W -S 251.7 pm. Both complexes were also characterized by !H and 13C NM R spectro­ scopy as well as by measurement of the magnetic susceptibilities in the tem perature range from 1.8 to 350 K. 
  Reference    Z. Naturforsch. 50b, 159—167 (1995); eingegangen am 23. August 1994 
  Published    1995 
  Keywords    D iethylthioethers of Molybdenum and Tungsten, Crystal Structure, NMR Spectra, Magnetic Susceptibility 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0159.pdf 
 Identifier    ZNB-1995-50b-0159 
 Volume    50 
119Author    FredR. Oschea, G. Ernot, H. Eckm, Anna, FrankW. Ellerb, Ekkehard Fluck0Requires cookie*
 Title    Ein neuer Heterocyclus  
 Abstract    , 2A3,4A5-[l,2,4]-O xadiphosphinin (2), als Ligand eines zw eikernigen Eisenkom plexes A New H eterocycle, 2A3,4A5-[l,2,4]-O xadiphosphinine (2), as L igand o f a Binuclear Iron C om plex Preparation and properties of a coordination compound are described, in which a carbonyl group in bis[(dicarbonyl)(/;;i-cyclopentadienyl)iron] is substituted by hitherto unknown octa-Af-methyl-2A',4A:i-[l,2,4]-oxadiphosphinine-2,4,4,6-tetramine (2). The 'H , '1P, and l3C NMR spectra are recorded and discussed in detail. The molecular structure of the iron complex 4 is described and interpreted. 
  Reference    Z. Naturforsch. 51b, 1725—1731 (1996); eingegangen am 27. Juni 1996 
  Published    1996 
  Keywords    [l, 2, 4]-Oxadiphosphinine, Binuclear Iron Complex, NMR Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-1725.pdf 
 Identifier    ZNB-1996-51b-1725 
 Volume    51 
120Author    Z. NaturforschRequires cookie*
 Title    Synthese und Reaktivität von 7-Triphenylstannyl-a-am inobuttersäure- derivaten  
 Abstract    Ph3SnCH2CH 2C H (NHCOOCH 2P h)COOCH3 (1) is synthesized by hydrostannation of methyl N-(benzyloxycarbonyl)vinylglycinate with Ph3SnH. The reaction o f 1 with HC1 in CH 3OH and with bromine in CHC13 yields the halostannylsubstituted compounds Ph3_"X,?SnCH2CH 2C H(NHCOOCH 2Ph)C OOCH3 (2 -4) (n = 1, 2; X = Cl, Br). By sapo­ nification with one equivalent of NaOH and subsequent acidification with HCl 1 is transformed into the free acid Ph3SnCH2C H 2C H(NHCOOCH2Ph)COOH (5) that undergoes cyclization into the 1,2-oxastanninane 6 with intramolecular elimination of benzene. IR, NMR data and the determination of the crystal structure of Ph2BrSnCH2CH2CH(NHCOOCH2Ph)COOCH3(3) reveal for 2 and 3 an intramolecular coordination of the N C (0)0-group at the tin atom to form a seven-membered ring. 
  Reference    (Z. Naturforsch. 52b, 9—16 [1997]; eingegangen am 20. August 1996) 
  Published    1997 
  Keywords    Triphenylstannyl Aminobutyric Acid Derivatives, Halostannyl Aminobutyric Acid Derivatives, IR Spectra, NMR Spectra, X-Ray 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0009.pdf 
 Identifier    ZNB-1997-52b-0009 
 Volume    52