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'13 C NMR Spectra' in keywords Facet   Publication Year 1987  [X]
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1987[X]
1Author    Christoph Bihlmayer, Susanna Kerschl, Bernd WrackmeyerRequires cookie*
 Title    Organoborierung von Alkinylstannanen, XX [1] Oligomerisation von 1-Propinyltrimethylstannan Organoboration of Alkynylstannanes, XX [1] Oligomerisation of 1-Propynyltrimethylstannane  
 Abstract    1-Propynylstannane (1) reacts with B-ethyl-9-borabicyclo[3.3.1]nonane (10) (ratio 2:1) to giva a new butadiene derivative (11). Attempts to oligomerize 1 by organoboration with trimethyl-borane (13) (ratio 2:1) lead to a hexatriene derivative (14). A larger excess of 1 (5:1) gives a mixture of higher oligomers, analogous to 14. The proposed structures of the new compounds 11, 14 are supported by "B, 13 C and 119 Sn NMR and mass spectra. 
  Reference    Z. Naturforsch. 42b, 715—719 (1987); eingegangen am 17. Dezember 1986/20. Januar 1987 
  Published    1987 
  Keywords    Alkynylstannanes, Organoboration, u9 Sn NMR Spectra, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0715.pdf 
 Identifier    ZNB-1987-42b-0715 
 Volume    42 
2Author    Rahman, Sajida Khanum, Yasmin Badar, Kaneez Fatima, Yusuf Ahmad, H.E JRequires cookie*
 Title    Atta-ur  
 Abstract    Continuing studies on the leaves of Rhazya stricta have resulted in the isolation of a new Picralima alkaloid, N h -methyl strictamine 2. 
  Reference    (Z. Naturforsch. 42b, 91—93 [1987]; received June 10 1986) 
  Published    1987 
  Keywords    Rhazya stricta, Alkaloids, Indolenine, 13 C NMR Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0091.pdf 
 Identifier    ZNB-1987-42b-0091 
 Volume    42 
3Author    KlausR. Pörschke, Richard MynottRequires cookie*
 Title    Bis(dimethyIphosphino)methan-Nickel(0)-Komplexe Bis(dimethylphosphino)methane-Nickel(0) Complexes  
 Abstract    The reaction of tris(ethene)nickel(0) with stoichiometric amounts of bis(dimethylphos-phino)methane (dmpm) in ether at low temperature affords the yellow crystalline, dinuclear complexes (dmpm)Ni 2 (QH 4) 4 (1) and (dmpm)2Ni 2 (C 2 H 4)2 (2). 2 reacts with ethyne to yield (dmpm) 2 Ni 2 (C 2 H 2) 2 (3). When 2 is treated with CO at —40 °C the primary product is (dmpm) 2 Ni 2 (CÖ) 2 (w-CO) (4). At 20 °C 4 is converted by additional CO into (dmpm) 2 Ni 2 (CO) 4 (5), which has already been characterized as the reaction product of Ni(CO) 4 with dmpm. In compounds 1—5 the bidentate dmpm acts as a bridging and not as a chelating ligand. The structures of complexes 1—4 were assigned on the basis of their 13 C and 31 P NMR spectra. 
  Reference    Z. Naturforsch. 42b, 421—424 (1987); eingegangen am 9. August 1986 
  Published    1987 
  Keywords    Carbonyl, Ethyne, Nickel(O), Phosphane, 13 C NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0421.pdf 
 Identifier    ZNB-1987-42b-0421 
 Volume    42 
4Author    Wolfgang Voelter, AdemirFarias Morel, Atta-Ur-Rahman, Muhammad Munawer, QureshiH E JRequires cookie*
 Title    Studies on the Peptide Alkaloids of Discaria febrifuga  
 Abstract    A new tryptophan-containing peptide alkaloid, "discarin-K", has been isolated from Discaria febrifuga, a shrub growing in Brazil, Argentina and Uruguay. Its structure has been determined as 1 on the basis of spectral studies. Another peptide alkaloid, franganin, was also isolated from the same plant and its 'H NMR and 13 C NMR have been studied using COSY-45, 2 D-J resolved and DEPT techniques. 
  Reference    Z. Naturforsch. 42b, 467—472 (1987); received November 28 1986 
  Published    1987 
  Keywords    Discaria febrifuga, Discarin-K, Franganin, 13 C NMR Spectra, 2D NMR Spectra 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0467.pdf 
 Identifier    ZNB-1987-42b-0467 
 Volume    42