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1Author    Jochen Eilermann, Martin LietzRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 67 [1]  
 Abstract    Die Darstellung von l.l.l-Tris(dichlorarsinomethyl)ethan, Ethan-l.l.l-tris(methylarsonsäure), 1.1.1-Tris (arsinomethyl)ethan und einem neuen Organocyclotriarsan Chemistry of Polyfunctional Ligands, 67 [1] The Preparation of l.l.l-Tris(dichloroarsinomethyl)ethane, Ethane-l.l.l-tris(methylarsonic acid), l.l.l-Tris(arsinomethyl)ethane and of a New Organocyclotriarsane l,l,l-Tris(dichlorarsinomethyl)ethane, CH3C(CH2AsCl2)3 (5) can be obtained in the reaction of CH3C(CH2AsNC6H4CH3)3 (4) with gaseous HCl. The heteroadamantane CH3C(CH2AsO)3 (6) reacts with AsCl3 or PC13 yielding also 5. CH3C(CH2AsO)3, CH3C(CH2AsS)3 and CH3C(CH2AsI 2)3 are oxidized with H202 to give CH3C[CH2As(0)(0H)2]3 (7) and CH3C[CH2As(0)(0H)2]3 • H20 (7 a). CH3C(CH2AsI2)3 and C(CH2AsI2)4 can be reduced with LiAlH4 to give CH3C(CH2AsH2)3 (9) and C(CH2AsH2)4 (12). Oxidation of 9 and 12 leads to the cyclotriarsane compounds CH3C(CH2As)3 (10) and H2AsCH2C(CH2As)3 (13). 
  Reference    (Z. Naturforsch. 37b, 73—80 [1982]; eingegangen am 29. Juni/21. September 1981) 
  Published    1982 
  Keywords    Arsenic Compounds, Organocyclotriarsane, Vibrational Spectra, *H NMR Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-0073.pdf 
 Identifier    ZNB-1982-37b-0073 
 Volume    37 
2Author    Dierk Knittel, Gabriela WeberRequires cookie*
 Abstract    The two stereoisomeric a-azidochalkones (1,3-diaryl-2-azidopropenones) are selectively obtain-able, depending on the temperature, by conden-sation of aldehydes with a-azidocarbonyl compounds. For the higher melting point compound the trans configuration is proved by single crystal X-ray analysis of its triphenyl-phosphazeno derivative. Analogous isomers may now be characterised from their X H NMR parameters. 
  Reference    Z. Naturforsch. 35b, 1326—1327 (1980); received May 21 1980 
  Published    1980 
  Keywords    a -Azidochalkones, S tereosel ecti vity, *H NMR Spectra, X-ray 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1326_n.pdf 
 Identifier    ZNB-1980-35b-1326_n 
 Volume    35 
3Author    W. Lübbe, W. PreetzRequires cookie*
 Title    Darstellung, n B-, 13C-, ^ -N M R -und Schwingungsspektren von ji-Pentamethylen-bis  
 Abstract    hexahydro-c/oso-hexaborat, [B6H6(CH2)5B6H6]2', und ji-Hexamethylen-bis-hexahydro-c/oso-hexaborat, [B6H6(CH2)6B6H6]2 Preparation, n B, l3C, 'H NMR and Vibrational Spectra of /x-Pentamethylene-bis-hexahydro-c/oso-hexaborate, [B6H6(CH2)5B6H6]2_, and /i-Hexamethylene-bis-hexahydro-c/<m>-hexaborate, [BftH ötC^^BftH ö]2- /i-Pentamethylene-bis-hexahydro-c/o5<7-hexaborate(2-), /u-Hexamethylene-bis-hexahydro-c/cw-hexaborate(2-), ' 
  Reference    Z. Naturforsch. 51b, 359—362 (1996); eingegangen am 7. September 1995 
  Published    1996 
  Keywords    H NMR Spectra, l3C NMR Spectra, "B NMR Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0359.pdf 
 Identifier    ZNB-1996-51b-0359 
 Volume    51 
4Author    Hartmut Hlawatschek, Gertrud Kiel, Gerhard GattowRequires cookie*
 Title    Kristallstruktur und spektroskopische Untersuchungen von Dithiomalonsäurediamid H2C(CS-NH2)2: Ein Beispiel für eine Helixstruktur Crystal Structure and Spectroscopic Investigations of H2C(CS-NH2)2: An Example for an Helix Structure  
 Abstract    The crystal structure of dithiomalonediamide (H2C(CS-NH2)2) has been determined. The compound crystallizes in the orthorhombic space group P2nn, No. 34, with a — 4.354(3), b = 7.940(5) and c = 8.458(5) A. The molecules are connected by S • • • H bridges to form helices along the crystallographic a axes. 
  Reference    Z. Naturforsch. 36b, 1386—1391 (1981); eingegangen am 7. Mai 1981 
  Published    1981 
  Keywords    Crystal Structure, Vibrational Spectra, 13 C NMR Spectra, !H NMR Spectra, Dithiomalonediamide 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1386.pdf 
 Identifier    ZNB-1981-36b-1386 
 Volume    36 
5Author    Michael Morr, Ludger Ernst, Lutz GrotjRequires cookie*
 Title    2' ,3' -Dideoxy-3' -C-(phosphonomethyl)adenosine, the Phosphonate Analogue of 2'-Deoxyadenosine 3'-Phosphate  
 Abstract    The title compound 7 is prepared in a five-step synthesis starting from l,2-di-0-acetyl-5-0-benzoyl-3-deoxy-3-0-(diethoxyphosphonomethyl)-/3-D-ribofuranose (2). The preferred conformation of 7 is derived from its X H and 13 C NMR data. 
  Reference    Z. Naturforsch. 38b, 1665—1668 (1983); received July 6 1983 
  Published    1983 
  Keywords    Nucleotide Analogue, Phosphonate, !H NMR Spectra, 13 C NMR Spectra, 31 P NMR Spectra, Conformation 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1665.pdf 
 Identifier    ZNB-1983-38b-1665 
 Volume    38 
6Author    W. Lübbe, W. PreetzRequires cookie*
 Title    undm-[(w-C4H9)4N][B6H5(CH2)2C6H4]  
 Abstract    Preparation, n B, 13C, 'H NM R Spectra and Vibrational Spectra o f 1,2-Xylylene-pentahydro-c/oso-hexaborate, cw-[B6H5(CH2)2C6H4]_ , and the Crystal Structures o f c/s-[P(C6H5)4][B 6H5(CIL,)2C6H4] and c/s-[(n-C4H9)4N ][B 6H5(CH2)2C6H4] 1,2-Xylylene-pentahydro-c/oso-hexaborat(1 -), ' By reaction of [B6H6]2-with u>,u/-dibromo-o-xylene in acetonitrile the 1,2-xylylene-pentahydro-c/oso-hexaborat, ds-[B 6H5(CH2)2C6H4]_ , is formed. The new ansa compound has been separated from excess [B6H6]2-and other reaction products by ion exchange chromatogra­ phy on diethylaminoethyl cellulose. The crystal structures of c/s-[P(C6H5)4][B6H5(CH2)2C6H4] (I) and as-[(n-C4H9)4N][B6H5(CH2)2C6H4] (II) have been determined by single crystal X-ray diffraction analysis: I is monoclinic, space group P 2 \/n with a = 13.715(5), b = 11.118(1) and c = 19.702(2) A, ß = 103.47(2)°; II is orthorhombic with a = 10.204(7), b = 13.352(4) and c = 20.824(8) A. The "B NMR spectrum confirms the structure with a hetero disubstituted octahedral B6 cage with local C2v symmetry. The l3C and 'H NMR spectra have been assigned in term of such a configuration. The IR and Raman spectra exhibit characteristic CH, BH, BC, B6 and arene vibrations. 
  Reference    Z. Naturforsch. 51b, 691—697 (1996); eingegangen am 25. August 1995 
  Published    1996 
  Keywords    H NMR Spectra, Vibrational Spectra, 13C NMR Spectra, 11B NMR Spectra 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0691.pdf 
 Identifier    ZNB-1996-51b-0691 
 Volume    51