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Krishnamurthi Muralidharan - One of the best experts on this subject based on the ideXlab platform.
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2,4,6-tris[bis(1H-tetrazol-5-yl)amino]-1,3,5-triazine as a nitrogen-rich material
Journal of Chemical Sciences, 2017Co-Authors: Vikas D Ghule, Krishnamurthi MuralidharanAbstract:This paper describes the synthesis, characterization and energetic properties of Tetrazole and triazine-based thermally stable, insensitive nitrogen-rich high energy density materials of N, N’, N”-(1,3,5-triazine-2,4,6-triyl) tris(N-cyanocyanamide) [ 1 ] and 2,4,6-tris[bis(1H-tetrazol-5-yl)amino]-1,3,5-triazine [ 2 ]. The compound 2 is the first example for compounds having six Tetrazole units on a triazine ring. Graphical Abstract Synopsis Synthesis, characterization and energetic properties of the molecule, $$\hbox {N}_{2},\hbox {N}_{2},\hbox {N}_{4},\hbox {N}_{4},\hbox {N}_{6},\hbox {N}_{6}$$ N 2 , N 2 , N 4 , N 4 , N 6 , N 6 -hexa(1H-tetrazol-5-yl)-1,3,5-triazine-2,4,6-triamine ( 2 ) having 79% nitrogen content with high HOF value is discussed. The high nitrogen content associated with high positive heat of formation of the compound 2 underline the structural importance of six Tetrazole groups in a molecule.
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synthesis of nitrogen rich imidazole 1 2 4 triazole and Tetrazole based compounds
RSC Advances, 2014Co-Authors: Dharavath Srinivas, Vikas D Ghule, Krishnamurthi MuralidharanAbstract:Imidazole, 1,2,4-triazole and Tetrazole based molecules were prepared for their possible applications in nitrogen-rich gas generators. The energetic salts of 1-(1H-1,2,4-triazol-3-yl)-1H-Tetrazole (9), 5-(1H-tetrazol-1-yl)-1H-1,2,4-triazol-3-amine (10), 1-(3-azido-1H-1,2,4-triazol-5-yl)-1H-Tetrazole (11) and 3-azido-1H-1,2,4-triazol-5-amine (12) were prepared with various cationic moieties. Their densities, heats of formation, chemical energy of detonation, detonation velocities and pressures were calculated. All of the compounds possessed high positive heats of formation due to high energy contribution from the molecular backbone of the corresponding compounds. The effect of the azole rings and nitro, amino, and azido groups on their physicochemical properties was examined and discussed.
Xianhe Bu - One of the best experts on this subject based on the ideXlab platform.
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tuning the framework topologies of coii doped znii Tetrazole benzoate coordination polymers by ligand modifications structures and spectral studies
Inorganic Chemistry, 2009Co-Authors: Weichao Song, Jianrong Li, Pengchao Song, Qun Yu, Xiaolan Tong, Xianhe BuAbstract:In our continuing efforts to explore the effects of ligand modifications on the structures and properties of their metal complexes, we studied the in situ [2 + 3] cycloaddition reactions of benzonitrile, o-phthalodinitrile, 3-cyanobenzoic acid, 4-cyanobenzoic acid with NaN3 in the presence of ZnII and/or CoII salts under hydrothermal conditions, and obtained four new CoII-doped ZnII-Tetrazole-benzoate coordination polymers with the formula of [CoxZn1−x(Lm)y]n [5-phenyl-1H-Tetrazole (HL1) for 1, 2-(1H-tetrazol-5-yl)benzoic acid (H2L2) for 2, 3-(1H-tetrazol-5-yl)benzoic acid (H2L3) for 3, and 4-(1H-tetrazol-5-yl)benzoic acid (H2L4) for 4]. The structure of 1 shows a classical diamondoid net, while 2 and 3, take 2D layer structure with (4.62)(4.6.4.6) topology and 3D SrAl2 topology, respectively. The structure of 4 exhibits a four-connected 3D network with rare non-diamondoid 66 topology. The coordination modes of the center metal and the ligands in the four complexes are almost the same, being tetrahedral o...
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zinc and cadmium coordination polymers with bis Tetrazole ligands bearing flexible spacers synthesis crystal structures and properties
Crystal Growth & Design, 2009Co-Authors: Xiaolan Tong, Weichao Song, Duozhi Wang, Tongliang Hu, Xianhe BuAbstract:Seven new metal complexes with the formulas, [Zn2(L1)2(H2O)]n (1), [Cd2(L1)Cl2(H2O)]n (2), [Cd3(L1)3(H2O)12]n (3), [Zn(L2)]n (4), [Cd2(L2)Cl2]n (5), {[Zn(L3)(H2O)4]·(H2O)2}n (6), and {[Cd3(L3)2Cl4]·(H2O)4}n (7), have been synthesized by the reactions of ZnII or CdII salts with three structurally related flexible bis(tetrazol-5-yl)alkanes, 1,2-bis(tetrazol-5-yl)ethane (H2L1), 1,3-bis(tetrazol-5-yl)propane (H2L2), and 1,4-bis(tetrazol-5-yl)butane (H2L3), and characterized by single crystal X-ray diffraction analysis, IR spectroscopy, and thermogravimetric (TG) analysis. Because of the geometrical requirements of different metal ions and the diverse coordination modes of the tetrazolate rings of flexible bis(Tetrazole) ligands as well as the different reaction conditions, the obtained complexes show diverse structures from one-dimensional (1D) chain to three-dimensional (3D) coordination polymers. 1, 4, and 6 are ZnII complexes in which the ZnII ions show tetrahedral coordination geometries. 1 and 4 are 3D f...
Dharavath Srinivas - One of the best experts on this subject based on the ideXlab platform.
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synthesis of nitrogen rich imidazole 1 2 4 triazole and Tetrazole based compounds
RSC Advances, 2014Co-Authors: Dharavath Srinivas, Vikas D Ghule, Krishnamurthi MuralidharanAbstract:Imidazole, 1,2,4-triazole and Tetrazole based molecules were prepared for their possible applications in nitrogen-rich gas generators. The energetic salts of 1-(1H-1,2,4-triazol-3-yl)-1H-Tetrazole (9), 5-(1H-tetrazol-1-yl)-1H-1,2,4-triazol-3-amine (10), 1-(3-azido-1H-1,2,4-triazol-5-yl)-1H-Tetrazole (11) and 3-azido-1H-1,2,4-triazol-5-amine (12) were prepared with various cationic moieties. Their densities, heats of formation, chemical energy of detonation, detonation velocities and pressures were calculated. All of the compounds possessed high positive heats of formation due to high energy contribution from the molecular backbone of the corresponding compounds. The effect of the azole rings and nitro, amino, and azido groups on their physicochemical properties was examined and discussed.
Vikas D Ghule - One of the best experts on this subject based on the ideXlab platform.
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2,4,6-tris[bis(1H-tetrazol-5-yl)amino]-1,3,5-triazine as a nitrogen-rich material
Journal of Chemical Sciences, 2017Co-Authors: Vikas D Ghule, Krishnamurthi MuralidharanAbstract:This paper describes the synthesis, characterization and energetic properties of Tetrazole and triazine-based thermally stable, insensitive nitrogen-rich high energy density materials of N, N’, N”-(1,3,5-triazine-2,4,6-triyl) tris(N-cyanocyanamide) [ 1 ] and 2,4,6-tris[bis(1H-tetrazol-5-yl)amino]-1,3,5-triazine [ 2 ]. The compound 2 is the first example for compounds having six Tetrazole units on a triazine ring. Graphical Abstract Synopsis Synthesis, characterization and energetic properties of the molecule, $$\hbox {N}_{2},\hbox {N}_{2},\hbox {N}_{4},\hbox {N}_{4},\hbox {N}_{6},\hbox {N}_{6}$$ N 2 , N 2 , N 4 , N 4 , N 6 , N 6 -hexa(1H-tetrazol-5-yl)-1,3,5-triazine-2,4,6-triamine ( 2 ) having 79% nitrogen content with high HOF value is discussed. The high nitrogen content associated with high positive heat of formation of the compound 2 underline the structural importance of six Tetrazole groups in a molecule.
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synthesis of nitrogen rich imidazole 1 2 4 triazole and Tetrazole based compounds
RSC Advances, 2014Co-Authors: Dharavath Srinivas, Vikas D Ghule, Krishnamurthi MuralidharanAbstract:Imidazole, 1,2,4-triazole and Tetrazole based molecules were prepared for their possible applications in nitrogen-rich gas generators. The energetic salts of 1-(1H-1,2,4-triazol-3-yl)-1H-Tetrazole (9), 5-(1H-tetrazol-1-yl)-1H-1,2,4-triazol-3-amine (10), 1-(3-azido-1H-1,2,4-triazol-5-yl)-1H-Tetrazole (11) and 3-azido-1H-1,2,4-triazol-5-amine (12) were prepared with various cationic moieties. Their densities, heats of formation, chemical energy of detonation, detonation velocities and pressures were calculated. All of the compounds possessed high positive heats of formation due to high energy contribution from the molecular backbone of the corresponding compounds. The effect of the azole rings and nitro, amino, and azido groups on their physicochemical properties was examined and discussed.
G. I. Koldobskii - One of the best experts on this subject based on the ideXlab platform.
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6.07 – Tetrazoles
Comprehensive Heterocyclic Chemistry III, 2020Co-Authors: Vladimir A. Ostrovskii, G. I. Koldobskii, R.e. TrifonovAbstract:Tetrazoles were discovered by Bladin over 120 years ago (1885). Since then, Tetrazole and its derivatives have attracted interest by their unique structure and extreme characteristics. Especially great activity in this field of chemistry has been observed since 1996. The number of publications and patents on preparation methods, properties, and applications of Tetrazoles grows every year with a higher rate than with respect to other heterocyclic systems. This fact actually reflects the significant achievements in fundamental research and industry in Tetrazole chemistry at the end of the twentieth and beginning of the twenty-first centuries. This chapter describes various aspects regarding Tetrazoles: electronic structure, thermodynamic and theoretical problems, including aromaticity, acid–base properties, tautomerism, and also experimental structural methods. Mechanism and kinetics of unimolecular thermal and photochemical reactions of Tetrazoles, molecular rearrangements, etc., are discussed. The reactivity of ring nitrogen and carbon atoms is treated: electrophilic attack at endocyclic nitrogen and carbon atoms, nucleophilic attack at endocyclic carbon, complex formation with metal ions. Considerable attention is paid to the reactivity of substituents attached to the ring nitrogen in neutral Tetrazoles, tetrazolate anions, and tetrazolium cations, and also to the electrophilic and nucleophilic attack at endocyclic carbon. Various possible procedures are described for ring synthesis from acyclic compounds, and also by transformations of other heterocyclic systems. Preferred routes to Tetrazole classes are indicated. In all sections of this chapter, attention is focused on new constructive ideas, efficient methods of synthesis and transformation of Tetrazoles, and urgent problems of Tetrazole chemistry. In the concluding sections, data are given on important compounds and applications: biologically active substances, drug applications, energetic Tetrazoles, Tetrazoles as promising objects in supramolecular chemistry and nanotechnology, and also as activators of chemical and biochemical reactions, etc.
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Tetrazoles: LII. Synthesis of functionally substituted Tetrazoles from benzene-1,3,5-tricarboxylic acid derivatives
Russian Journal of Organic Chemistry, 2008Co-Authors: M. V. Zatsepina, T. V. Artamonova, G. I. KoldobskiiAbstract:N,N′,N″-Triarylbenzene-1,3-5-tricarboximidoyl chlorides reacted with sodium azide under conditions of phase-transfer catalysis to give functionally substituted Tetrazoles whose subsequent functionalization led to complex heterocyclic structures which may be regarded as first-generation Tetrazole-containing dendrimers.
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Drugs in the Tetrazole series. (Review)
Chemistry of Heterocyclic Compounds, 2007Co-Authors: L. V. Myznikov, A. Hrabalek, G. I. KoldobskiiAbstract:Data on drugs of the Tetrazole series published over the last decade are reviewed. The use of Tetrazoles as isosteric substituents of various functional groups is examined.
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Tetrazoles: XLIX. Alkylation of Tetrazoles with tetrakis(chloroacetoxymethyl)methane
Russian Journal of Organic Chemistry, 2006Co-Authors: M. V. Zatsepina, T. V. Artamonova, G. I. KoldobskiiAbstract:Alkylation of 1-aryl-4,5-dihydro-1H-tetrazol-5-ones and 1-phenyl-4,5-dihydro-1H-Tetrazole-5-thione with tetrakis(2-chloroacetoxymethyl)methane in boiling acetonitrile in the presence of potassium bromide and triethylamine gives tetrakis[2-(4-aryl-5-oxo-4,5-dihydro-1H-tetrazol-1-yl)acetoxymethyl]-methanes and tetrakis[2-(1-phenyl-1H-tetrazol-5-ylsulfanyl)acetoxymethyl]methane, respectively. The alkylation process is considerably accelerated under microwave irradiation.
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Strategies and prospects in functionalization of Tetrazoles
Russian Journal of Organic Chemistry, 2006Co-Authors: G. I. KoldobskiiAbstract:The review summarizes the methods of functionalization of Tetrazoles, which were reported from 2001 to mid 2005, and analyzes main strategies in the development of this field of Tetrazole chemistry.
