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'4 triazole' in keywords
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1999 (1)
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1Author    Ger Vos, AnthonieJ. De Kok, GerritC. VerschoorRequires cookie*
 Title    Complexes of 1,2,4-Triazoles, Part XVII The Crystal Structure of Tris-/«-(4-ethyl-l,2,4-triazole-N l ,N 2 )- (4-ethyl-l,2,4-triazole-N 1 )-aquo-bis [bis(thiocyanato-N)- nickel(II)]hydrate, Ni2(C4N3H7)4(H20)(NCS)4 *H20 (x ~ 2.5)  
 Abstract    The crystal structure of Ni2(C4N3H7)4(H20)(NCS)4 • 2.5 H20 has been determined by X-ray diffraction techniques. The compound crystallizes in the monoclinic space group P2i/n with a — 15.121(4), 6= 13.237(2), c= 18.069(3), ß = 94.71(2)° and Z = 4; R = 0.040 (Rm = 0.051). The compound consists of dimeric units in which two Ni ions are bridged by three ethyltriazole (Ettrz) groups. For one Ni, two N donating NCS" groups and an Ettrz coordinating by only one N atom complete the NiNe octahedron. The other Ni atom, which is also octahedrally coordinated, has a coordinated water molecule instead of a monodentate Ettrz. 
  Reference    Z. Naturforsch. 36b, 809—813 (1981); received April 2 1981 
  Published    1981 
  Keywords    4-Ethyl-l, 2, 4-triazole, Binuclear Compound, Hydrogen Bonding 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0809.pdf 
 Identifier    ZNB-1981-36b-0809 
 Volume    36 
2Author    Wim Vreugdenhil, MarcelF J Schoondergang, JaapG. Haasnoot, Jan ReedijkRequires cookie*
 Title    Magnetic and Spectroscopic Properties of Metal(II) Thiocyanate Compounds with 3,4-Dialkyl Substituted 1,2,4-TriazoIes  
 Abstract    Syntheses, spectroscopic and magnetic properties are described of a series of metal(II) thio-cyanate compounds with the asymmetric ligands 3-methyl-4-ethyl-l,2,4-triazole and 3-methyl-4-;-butyl-l,2,4-triazole. A dinuclear structure is proposed for the manganese, cobalt and nickel compounds based on the magnetic behaviour as well as on spectroscopic and analytical data. These compounds show antiferromagnetic interaction in the temperature range 4—80 K. The zinc compounds appear to be mononuclear, whereas a chain-like structure is proposed for the cad-mium compounds. 
  Reference    Z. Naturforsch. 42b, 791—795 (1987); received January 19 1987 
  Published    1987 
  Keywords    Asymmetric 1, 2, 4-Triazoles, Magnetic Exchange, Binuclear Compounds, Thiocyanate 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0791.pdf 
 Identifier    ZNB-1987-42b-0791 
 Volume    42 
3Author    JaapG. Haasnoot, WillemL. GroeneveldRequires cookie*
 Title    Complexes of 1,2,4-Triazoles, VII [1] Preparation and Vibrational Spectra of 4,4'-Bi-l,2,4-triazole and Some of its Complexes with Transition Metal(II) Thiocyanates  
 Abstract    The preparation and characterization of 4,4'-bi-l,2,4-triazole is described. The com-pound is a strong, polydentate, polynucleating nitrogen donor. Two complexes, M(btr)2(NCS)2H20 M = Co, Ni, are described. The vibrational spectra of ligand and complexes are compared. A structure for the complexes is proposed. 
  Reference    Z. Naturforsch. 34b, 1500—1506 (1979); received July 2 1979 
  Published    1979 
  Keywords    4, 4'-Bi-l, 2, 4-triazole, IR, Ligand Field, Polynuclear Complexes 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1500.pdf 
 Identifier    ZNB-1979-34b-1500 
 Volume    34 
4Author    Ger Vos, JaapG. Haasnoot, WillemL. GroeneveldRequires cookie*
 Title    Complexes of 1,2,4-Triazoles, Part XVI Binuclear Complexes of Transition Metal(II)thiocyanates with 4-Ethyl-l,2,4-triazole  
 Abstract    Coordination compounds of 4-ethyl-l,2,4-triazole (Ettrz) with Mn, Fe, Co, Ni, Cu and Zn are reported. The compounds have been identified and characterized by chemical analyses, infrared and ligand field spectra, electron paramagnetic resonance (e.p.r.) measurements, magnetic susceptibility measurements and thermoanalytical experiments. Except for the Cu compound, which is polynuclear, all compounds appear to be binuclear, with both bridging bidentate and non-bridging triazole ligands. The overall formula is M(Ettrz)2(NCS)2(H20)3/2 for Mn, Fe, Co and Ni. The copper and zinc compounds have the formula Cu(Ettrz)2(NCS)2 and Zn(Ettrz)3/2(NCS)2. 
  Reference    Z. Naturforsch. 36b, 802—808 (1981); received March 2 1981 
  Published    1981 
  Keywords    4-Ethyl-l, 2, 4-triazole, Ligand Field, Magnetic Exchange, Binuclear Complexes 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-0802.pdf 
 Identifier    ZNB-1981-36b-0802 
 Volume    36 
5Author    SanaaM. EldinRequires cookie*
 Title    Reactions of Cyanothioacetamide Derivatives with 2-Hydrazinothiazol-4(5//)-one: Synthesis, Cyclization and Biological Evaluation of Several New Annelated Pyran, Thiazole, 1,2,4-Triazole and 1,2,4-Triazine Derivatives  
 Abstract    The thiocarboxamidocinnamonitriles (2) reacted with 2-hydrazinothiazol-4(5//)-one (3) to afford the corresponding pyrano[2,3-d]thiazoles (6). Compounds 6 were used for the synthe­ sis of several new annelated pyran, thiazole, 1,2,4-triazole and 1,2,4-triazine derivatives via their reactions with chloroacetic acid, ethyl chloroformate, diethyl oxalate and acetylacetone. Structures were established based on elemental and spectral data studies. Some of the newly synthesized heterocyclic derivatives were tested for their antimicrobial activity. 
  Reference    Z. Naturforsch. 54b, 1589—1597 (1999); received July 2 1999 
  Published    1999 
  Keywords    Thiocaboxamidocinnamonitriles, Pyrans, Thiazoles, 1, 2, 4-Triazoles, 1, 2, 4-Triazines 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1589.pdf 
 Identifier    ZNB-1999-54b-1589 
 Volume    54