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'Thioureas' in keywords Facet   section ZfN Section B  [X]
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1998 (1)
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1986 (1)
1Author    Cyril Párk, M. Ohammed, A. Al-SalamahRequires cookie*
 Title    Thermal Decomposition of Aromatic Thioureas [1]  
 Abstract    T herm al decomposition of aromatic and heteroarom atic thioureas in boiling chlorobenzene is a first-order reaction. The reaction involves intram olecular hydrogen transfer followed by a cleav­ age of the C -N bond which is the rate-limiting step. The rate constants of decom position have been determ ined and correlated with quantum -chem ical reactivity indices. 
  Reference    (Z. Naturforsch. 41b, 101 [1986]; received August 14 1985) 
  Published    1986 
  Keywords    Thioureas, Isothiocyanates, Thermal D ecom position, Side-Chain Elim ination, Kinetics 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-0101.pdf 
 Identifier    ZNB-1986-41b-0101 
 Volume    41 
2Author    Oliver Seidelmann, Lothar Beyer, Rainer RichterRequires cookie*
 Title    N,N-Disubstituierte N'-Ferrocenoylthioharnstoffe als zweizähnige Komplexliganden für Übergangsmetallionen. Kristallstruktur von Bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II) N,N-Disubstituted N'-Ferrocenoyl Thioureas as Bidentate Ligands for Transition Metal Ions. Crystal Structure of Bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II)  
 Abstract    N,N-diethyl-N'-ferrocenoyl-thiourea and N-(morpholino-thiocarbonyl)ferrocenecarboxylic amide have been prepared by the reaction of ferrocenoyl chloride with potassium thiocyanate and the respective amine in dry acetone. These bidentate ligands yield neutral heterometal-lic complexes with Ni(II), Cu(II), Mn(II) and Co(III). The dark brown air stable crystals of bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II) were characterized by X-ray structure de­ termination. Lattice dimensions: a = 1870.9(1), b = 1161.5(1), c = 1491.4(1) pm; space group Pca2!, Z = 4, R = 0.030 for 5707 observed reflections. 
  Reference    Z. Naturforsch. 50b, 1679—1684 (1995); eingegangen am 23. März 1995 
  Published    1995 
  Keywords    Ferrocene Complexes, Thiourea, Hetero Metal Complexes, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1679.pdf 
 Identifier    ZNB-1995-50b-1679 
 Volume    50 
3Author    Frank Leßmann3, Lothar Beyer3, Rainer Richter3, Reinhard MeusingerbRequires cookie*
 Title    N-Benzoylthiocarbamoyl Amino Acid Ethyl Esters as Chelate Ligands for Transition Metal Ions  
 Abstract    The reactions of benzoyl isothiocyanate with amino acid ethyl esters (N-butyl glycine ethyl ester, (S)-(-)-proline ethyl ester) give N-benzoylthiocarbamoyl amino acid ethyl esters. Apart from the expected N-benzoylthiocarbamoyl (S)-(-)-proline ethyl ester the racemic N-benzoyl­ thiocarbamoyl (/?)/(S)-proline ethyl ester is formed because of base catalyzed racemization of the educt (5')-(-)-proline ethyl ester during the reaction of (S)-(-)-proline ethyl ester hy­ drochloride with triethylamine. The structures of both compounds were established by X-ray crystal structure analysis and specific optical rotation measurements. The ligands yield neutral 2:1 chelates with Ni , Cu11, Pd11 and Pt11. The carboxylic oxygen atoms are not involved in the chelation. The ligands and the resultant complexes show configurational E/Z isomerism. In the case of the chelates of the racemic N-benzoylthiocarbamoyl (/?)/(5)-proline ethyl ester, additional R/S isomerism is observed as shown by 
  Reference    Z. Naturforsch. 53b, 981—990 (1998); received November 11 1997 
  Published    1998 
  Keywords    Thioureas, Amino Acid Ethyl Esters, Chelates, NMR Data, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0981.pdf 
 Identifier    ZNB-1998-53b-0981 
 Volume    53