The Experts below are selected from a list of 8772 Experts worldwide ranked by ideXlab platform
Axel Schulz - One of the best experts on this subject based on the ideXlab platform.
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Characterization, Crystal Structure of 2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a]-[1,3,5]triazine, and Improved Crystal Structure of 2,4,6-Triazido-1,3,5-triazine
European Journal of Inorganic Chemistry, 1998Co-Authors: Elmar Keßenich, Thomas M. Klapötke, Jörg Knizek, Heinrich Nöth, Axel SchulzAbstract:2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a][1,3,5]triazine (1) was synthesized by reaction of cyanuric azide with triphenylphosphane. 1 is characterized by X-ray structural analysis, IR, Raman, and NMR spectroscopy. The obtained spectra showed that the remaining azide group in 1 reacts with the N4 atom of the triazine ring and forms a tetrazole. An improved crystal structure for 2,4,6-triazido-1,3,5-triazine (2) was determined and for the first time a 14N-NMR Spectrum was obtained. CAUTION: 2 (Cyanuric azide) is explosive! The explosive nature increases with greater purity and crystal size.
Elmar Keßenich - One of the best experts on this subject based on the ideXlab platform.
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Characterization, Crystal Structure of 2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a]-[1,3,5]triazine, and Improved Crystal Structure of 2,4,6-Triazido-1,3,5-triazine
European Journal of Inorganic Chemistry, 1998Co-Authors: Elmar Keßenich, Thomas M. Klapötke, Jörg Knizek, Heinrich Nöth, Axel SchulzAbstract:2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a][1,3,5]triazine (1) was synthesized by reaction of cyanuric azide with triphenylphosphane. 1 is characterized by X-ray structural analysis, IR, Raman, and NMR spectroscopy. The obtained spectra showed that the remaining azide group in 1 reacts with the N4 atom of the triazine ring and forms a tetrazole. An improved crystal structure for 2,4,6-triazido-1,3,5-triazine (2) was determined and for the first time a 14N-NMR Spectrum was obtained. CAUTION: 2 (Cyanuric azide) is explosive! The explosive nature increases with greater purity and crystal size.
Jörg Knizek - One of the best experts on this subject based on the ideXlab platform.
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Characterization, Crystal Structure of 2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a]-[1,3,5]triazine, and Improved Crystal Structure of 2,4,6-Triazido-1,3,5-triazine
European Journal of Inorganic Chemistry, 1998Co-Authors: Elmar Keßenich, Thomas M. Klapötke, Jörg Knizek, Heinrich Nöth, Axel SchulzAbstract:2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a][1,3,5]triazine (1) was synthesized by reaction of cyanuric azide with triphenylphosphane. 1 is characterized by X-ray structural analysis, IR, Raman, and NMR spectroscopy. The obtained spectra showed that the remaining azide group in 1 reacts with the N4 atom of the triazine ring and forms a tetrazole. An improved crystal structure for 2,4,6-triazido-1,3,5-triazine (2) was determined and for the first time a 14N-NMR Spectrum was obtained. CAUTION: 2 (Cyanuric azide) is explosive! The explosive nature increases with greater purity and crystal size.
Heinrich Nöth - One of the best experts on this subject based on the ideXlab platform.
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Characterization, Crystal Structure of 2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a]-[1,3,5]triazine, and Improved Crystal Structure of 2,4,6-Triazido-1,3,5-triazine
European Journal of Inorganic Chemistry, 1998Co-Authors: Elmar Keßenich, Thomas M. Klapötke, Jörg Knizek, Heinrich Nöth, Axel SchulzAbstract:2,4-Bis(triphenylphosphanimino)tetrazolo[5,1-a][1,3,5]triazine (1) was synthesized by reaction of cyanuric azide with triphenylphosphane. 1 is characterized by X-ray structural analysis, IR, Raman, and NMR spectroscopy. The obtained spectra showed that the remaining azide group in 1 reacts with the N4 atom of the triazine ring and forms a tetrazole. An improved crystal structure for 2,4,6-triazido-1,3,5-triazine (2) was determined and for the first time a 14N-NMR Spectrum was obtained. CAUTION: 2 (Cyanuric azide) is explosive! The explosive nature increases with greater purity and crystal size.
Ae Ran Lim - One of the best experts on this subject based on the ideXlab platform.
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Structural changes, thermodynamic properties, 1H magic angle spinning NMR, and 14N NMR of (NH4)2CuCl4·2H2O
RSC Advances, 2018Co-Authors: Ae Ran Lim, Sun Ha KimAbstract:The structural changes and thermodynamic properties of (NH4)2CuCl4·2H2O were studied by differential scanning calorimetry (DSC) and thermogravimetric (TG) analysis. In addition, the chemical shift, line width, and spin-lattice relaxation time of the crystals were also investigated by 1H magic angle spinning nuclear magnetic resonance (MAS NMR), focusing on the role of NH4 and H2O near the phase transition temperature. The change at TC2 (=406 K) and TC3 (=437 K) seems to be a chemical change caused by thermal decomposition rather than a physical change such as a structural phase transition. The changes in the temperature dependence of these data near TC2 are related to variations in the environments surrounding NH4 and H2O. The 14N NMR Spectrum is also measured in order to investigate local phenomena related to the phase transition.
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Structural characteristics for phase transitions of [N(CH3)4]2CuCl4 by 13C CP/MAS NMR and 14N NMR
Solid state nuclear magnetic resonance, 2015Co-Authors: Nam Hee Kim, Ae Ran LimAbstract:Abstract Structure geometry changes in [N(CH3)4]2CuCl4 near the phase transition temperature were studied by 13C CP/MAS NMR and 14N NMR Spectrum. We distinguished the two chemically inequivalent N(1)(CH3)4 and N(2)(CH3)4 groups by 13C CP/MAS NMR and 14N NMR Spectrum. The abrupt changes in chemical shifts and the split of the NMR signals near the phase transition temperatures for 13C and 14N are explained by a structural phase transition, implying that the structural geometry depends on the temperature. The mechanism behind this phase transition is based on ferroelasticity, and is also mainly related to the 14N ions in N(CH3)4 ions. Furthermore, both phases III and IV exhibit ferroelastic properties with identical orientational domains.
