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101.
Nitrogen‐Rich Alkali Metal Salts (Na and K) of [Bis(N,N‐bis(1H‐tetrazol‐5‐yl)amine)‐zinc(II)] Anion: Syntheses,Crystal Structures,and Energetic Properties 下载免费PDF全文
Fugang Li Wenyuan Zhao Sitong Chen Tonglai Zhang Zunning Zhou Li Yang 《无机化学与普通化学杂志》2015,641(5):911-916
Two nitrogen‐rich alkali metal salts based on nitrogen‐rich anion [Zn(bta)2]2–: {[Na2Zn(bta)2(H2O)8] · H2O}n ( 1 ) and {[K2Zn(bta)2(H2O)4]}n ( 2 ) were synthesized by reactions of alkali hydroxide, N,N‐bis(1H‐tetrazol‐5‐yl)amine (H2bta), and zinc chloride in aqueous solutions. The crystal structures of 1 and 2 were determined by low temperature single‐crystal X‐ray diffraction and fully characterized by elemental analysis and FT‐IR spectroscopy. The structures demonstrate that an infinite 1‐dimensional (1D) chain structure is constructed by Na+ ions and bridging water molecules in compound 1 , which is connected by extensive hydrogen bonds forming a complex 3D network, whereas compound 2 features a more complicated 3D metal‐organic framework (MOF). The thermal behaviors of 1 and 2 were investigated by differential scanning calorimetry (DSC) measurements. The DSC results illustrate that both compounds exhibit high thermal stabilities (decomposition temperature > 345 °C). In addition, the heats of formation were calculated on the basis of the experimental constant‐volume energies of combustion measured by using bomb calorimetry. Lastly, the sensitivities towards impact and friction were assessed according to Bundesamt für Materialforschung (BAM) standard methods. 相似文献
102.
Ahmad Shaabani Mojtaba MahyariMozhdeh Seyyedhamzeh Sajjad KeshipourSeik Weng Ng 《Tetrahedron letters》2011,52(34):4388-4391
A novel one-pot pseudo nine-component synthesis of zinc 1,5-disubstituted 1H-tetrazol-5-yl coordination complexes in good yields starting from simple and readily available substrates, including a 1,3-dicarbonyl compound, an isocyanide, N,N-dimethylformamide dimethyl acetal, sodium azide, and zinc chloride in methanol at ambient temperature, is described. 相似文献
103.
104.
Coordination Architectures of Lanthanum Complexes Based on Bifunctional 5‐Substituted Tetrazolecarboxylate Ligands 下载免费PDF全文
Lei Shen Yu‐Ting Min Jing Wang Yue Xu Hong‐Jian Chen Jie Yang Xi Zhang Mu‐Lan Wu Gao‐Wen Yang Bo Wei 《无机化学与普通化学杂志》2016,642(2):174-181
Three complexes of bifunctional 5‐substituted tetrazolatecarboxylate ligands [2‐(5‐(pyrazin‐2‐yl)‐2H‐tetrazol‐2‐yl)acetic acid (Hpztza), 3‐(5‐amino‐2H‐tetrazol‐1(5H)‐yl)propanoic acid (Hatzp), and N,N′‐bis(tetrazol‐5‐yl)anime‐N2,N2′‐diacetic acid (H2datza)], namely a mononuclear structure [La(pztza)2(H2O)5] · 4H2O · pztza ( 1 ), a 1D polymeric chain structure [La2(atzp)4(H2O)8] · 2NO3 · 2H2O ( 2 ), and a 2D layer network [La(datza)(H2O)3] · 4H2O ( 3 ) were prepared and structurally characterized by elemental analysis, IR spectroscopy, and single‐crystal X‐ray diffraction. The structures of these complexes are controlled not only by the number and different coordination modes of the tetrazole‐carboxylate ligands but also the different 5‐substituents of the tetrazole ring. The complexes show ligand‐centered luminescence at room temperature in the solid state. The obvious enhancements in luminescence make these complexes to be the potential materials for optical use. 相似文献
105.
B. Saha 《Tetrahedron》2008,64(37):8676-8684
Three new substrates with an aryl amine moiety attached to quinoxalines, triazoles and tetrazoles either via C or N have been used for the Pictet-Spengler reaction. The substrates have been designed by applying the concept of ‘aryl amine attached to a deactivated heteroaromatic ring’ in a manner to facilitate endo cyclization. This is in contrast to the substrates used traditionally and reported earlier by us that are based on either aliphatic or aryl amine, respectively, attached to an activated heterocyclic ring. The Pictet-Spengler condensation of the three substrates with aldehydes led to the synthesis of novel N-rich polyheterocyclic system hitherto not reported. Our modified strategy opens up possibilities to design novel substrates with aryl amines linked via C or N to either deactivated or activated heterocyclic privileged structure, which in turn can be used for the synthesis of novel fused polyheterocyclic skeletons. 相似文献
106.
Hong Zhao Qiong Ye Qian Wu Yu‐Mei Song Yu‐Juan Liu Ren‐Gen Xiong 《无机化学与普通化学杂志》2004,630(10):1367-1370
The reaction of 4,5‐dicyanoimidazole with ZnCl2 and NaN3 in the presence of (1,10)‐phenanthroline and water affords a novel one‐dimensional zinc coordination polymer, [zinc{(4,5‐ditetrazoyl)‐imidazole}{(1,10)‐phenanthroline}(H2O)]n ( 1 ), in which 1 contains a ditetrazole ligand and strongly supports the Demko‐Sharpless' tetrazole synthesis reaction. The structure was determined by single crystal X‐ray diffraction. Crystal data: P21/n; a = 11.908(18); b = 8.133(10); c = 21.01(3) Å; β = 112.46(7)°; V = 1880(1) Å3; Z = 4; R1 = 0.0882, wR2 = 0.2091. 相似文献
107.
The syntheses of tetra-tetrazole macrocycles, containing two bis-tetrazole units linked by a variety of alkyl-chain lengths from four to eight carbons, are described. The crystal structures of three of these derivatives are reported, and the molecular conformation in the solid state is compared to that of the previously reported tetra-tetrazole macrocycle and to other bis- and tris(tetrazole)benzene structures. The macrocycle conformation is influenced by the length of the alkyl-chain linker, the relative orientation of the tetrazole rings on the benzene ring and by intermolecular interactions. In the macrocycles based on 1,2-bis(tetrazole)benzene, the adjacent tetrazole rings on the benzene ring are prevented from becoming co-planar on intramolecular (steric) grounds. In the 1,3- and 1,4-bis(tetrazole)benzene derivatives, there is no such impediment, and a co-planar arrangement is observed where intra- and/or intermolecular stacking interactions exist. Deviations from co-planarity are associated with optimisation of intermolecular interactions between the tetrazole rings and adjacent alkyl chains. In the macrocycle based on 1,4-bis(tetrazole)benzene with four-carbon linkers, an intramolecular stacking interaction exists, which precludes the presence of any cavity. In the macrocycle based on 1,3-bis(tetrazole)benzene with six-carbon linkers, a cavity of 10.8×9.4 Å is observed for each molecule in the solid state, although the packing of adjacent molecules is such that there are no extended channels running through the crystal. 相似文献
108.
Racemic 4-(substituted-1H-1,2,3-triazol-1-yl), 4-aryl and 4-(arylmethyl)tetrazolyl-pyroglutamic and proline derivatives were synthesized from dimethyl-2,4-dibromoglutaryle 1 in good yield using mild reaction conditions. The key step for the preparation of the triazole substituted molecule was the 1,3-dipolar cycloaddition of an acetylenic compound with an azido derivative. The tetrazole derivatives were prepared by the selective N2-alkylation of 5-substituted tetrazoles with 1. 相似文献
109.
The reactions of 1,2-bis(tetrazol-5-yl)benzene (1), 1,3-bis(tetrazol-5-yl)benzene (2), 1,4-bis(tetrazol-5-yl)benzene (3), 1,2-(Bu3SnN4C)2C6H4 (4), 1,3-(Bu3SnN4C)2C6H4 (5) and 1,4-(Bu3SnN4C)2C6H4 (6) with 1,2-dibromoethane were carried out by two different methods in order to synthesise pendant alkyl halide derivatives of the parent bis-tetrazoles. This lead to the formation of several alkyl halide derivatives, substituted at either N1 or N2 on the tetrazole ring, as well as the surprising formation of several vinyl derivatives. The crystal structures of both 1,2-[(2-vinyl)tetrazol-5-yl)]benzene (1-N,2-N′) (1b) and 1,3-bis[(2-bromoethyl)tetrazol-5-yl]benzene (2-N,2-N′) (5d) are discussed. 相似文献
110.
Janez Pirnat Janko Lunik Vojko Jazbinek Veselko
agar Janez Seliger Thomas M. Klaptke Zvonko Trontelj 《Chemical physics》2009,364(1-3):98-104
14N NQR frequencies and spin–lattice relaxation times were measured in technologically important 5-aminotetrazole and 5-aminotetrazole monohydrate at different temperatures between 77 K and 300 K. Five NQR triplets ν+, ν− and ν0 were found for the five inequivalent nitrogen atoms in each compound between 0.7 MHz and 4 MHz. Carr-Purcell based multipulse sequences were used to accumulate quadrupole echo signals before the FFT analysis. Assignment of the frequencies to atomic positions was made and the results are analysed in relation to the molecular chemical bonds and possible H-bonds in the crystal structures. The new NQR frequencies are reasonably related to the previously published NQR spectrum of the third family member, 1H-tetrazole. 相似文献