| | 1 | Author
| Ger Vos, AnthonieJ. De Kok, GerritC. Verschoor | Requires 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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| default:Reihe_B/36/ZNB-1981-36b-0809.pdf | | | | Identifier
| ZNB-1981-36b-0809 | | | | Volume
| 36 | |
| 2 | Author
| Wim Vreugdenhil, MarcelF J Schoondergang, JaapG. Haasnoot, Jan Reedijk | Requires 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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| default:Reihe_B/42/ZNB-1987-42b-0791.pdf | | | | Identifier
| ZNB-1987-42b-0791 | | | | Volume
| 42 | |
| 3 | Author
| JaapG. Haasnoot, WillemL. Groeneveld | Requires 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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| default:Reihe_B/34/ZNB-1979-34b-1500.pdf | | | | Identifier
| ZNB-1979-34b-1500 | | | | Volume
| 34 | |
| 4 | Author
| Ger Vos, JaapG. Haasnoot, WillemL. Groeneveld | Requires 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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| default:Reihe_B/36/ZNB-1981-36b-0802.pdf | | | | Identifier
| ZNB-1981-36b-0802 | | | | Volume
| 36 | |
| 5 | Author
| SanaaM. Eldin | Requires 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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| default:Reihe_B/54/ZNB-1999-54b-1589.pdf | | | | Identifier
| ZNB-1999-54b-1589 | | | | Volume
| 54 | |
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