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    Nitrogen-rich compounds: s-triazine and tri-s-triazine derivatives as high energy materials
    ( 2021-12-01) Hanumantha Rao, Muddamarri ; Ghule, Vikas D. ; Muralidharan, Krishnamurthi
    Abstract: This article describes the syntheses, characterization, and energetic properties of 4, 6-diazido-N, N-dimethyl-1, 3, 5-triazin-2-amine and 2, 4, 6-tris (5-(3, 5-dinitrophenyl)-1H-tetrazol-1-yl)-1, 3, 5-triazine. Also, this paper emphasizes the insensitive and thermally stable energetic molecules like melem, melem-ammonium perchlorate mixture, and hydrazinium cyamelurate. All these compounds possess good energetic properties viz., the heat of formation and heat of combustion. Graphic abstract: Synthesis and characterizations and energetic properties of 4, 6-diazido-N, N-dimethyl-1, 3, 5-triazin-2-amine (3); 2, 4, 6-tris (5-(3, 5-dinitrophenyl)-1H-tetrazol-1-yl)-1, 3, 5-triazine (4) and hydrazinium cyamelurate (10) are described. The thermal stabilities, energetic properties and sensitivity parameters are compared with standard high-energy materials. (i) Syntheses and characterization of 4, 6-diazido-N, N-dimethyl-1, 3, 5-triazin-2-amine (3); 2, 4, 6-tris (5-(3, 5-dinitrophenyl)-1H-tetrazol-1-yl)-1, 3, 5-triazine (4) and hydrazinium cyamelurate (10) are described. (ii) Experimental energetic properties and sensitivity parameters of these compounds were discussed.[Figure not available: see fulltext.]
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    Aziridinolysis of (Triphenylphosphazenyl)pentachlorocyclotriphosphazene X-Ray Crystal Structure of N < inf > 3 < /inf > P < inf > 3 < /inf > (NPPh < inf > 3 < /inf > )(NC < inf > 2 < /inf > H < inf > 4 < /inf > ) < inf > 5 < /inf >
    ( 1984-05-01) Swamy, K. C.Kumara ; Poojary, M. Damodara ; Krishnamurthy, S. S. ; Manohar, H.
    Reaction of aziridine with N3P3(NPPh3)Cl5 (1) affords the derivatives N3P3(NPPh3)Cl5-n(NC2H4)n (n = 1-5) whose structures are elucidated by NMR spectroscopy. The X-Ray crystal structure of N3P3(NPPh3)(NC2H4)5 shows a new conformation of the — NPPh3 group which would explain the upfield shift of the aziridino protons at the ≡P(NC2H4)(NPPh3) site. © 1984, Walter de Gruyter. All rights reserved.
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    Studies of phosphazenes: Part 27. synthesis of (triphenylphosphazenyopentachloro and pentafluoro-cyclotriphqsphazenes
    ( 1985-08-01) Kumara Swamy, K. C. ; Ramabrahmam, P. ; Krishnamurthy, S. S.
    The triphenylphosphazenyl cyclophosphazene, N3P3(N=PPh3)C15 (1) has been prepared by two new methods using Appel and Staudinger reactions. The effect of solvent on the synthesis of 1 from the reaction of gem-N3P3(NH2)2C14 with Ph3PC12 (Kirsanov method) has been investigated. The fluoro compound, N3P3(N=PPh3)F5(2), is obtained readily in good yields (85%) by the treatment of 1 with KF in methyl cyanide. Copyright © 1985 by Marcel Dekker, Inc.
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    Studies of phosphazenes. Part 22. High-field nuclear magnetic resonance investigation of novel isomeric oxophosphazadienes
    ( 1985-12-01) Swamy, K. C.Kumara ; Krishnamurthy, Setharampattu S.
    The reaction of N3P3(NPPh3)Cl5 with an excess of methoxide yields the 'hydroxy'-derivatives, N3P3(NPPh3)(OMe)4(OH) and N3P3(NPPh3)(OMe)3(OH)2, in addition to the fully methoxylated derivative N3P3(NPPh3)(OMe)5. The analogous reaction of gem-N3P3(NPPh3)(NMe2)Cl4 with methoxideaffords N3P3(NPPh3)(NMe2)(OMe)4 and N3P3(NPPh3)(NMe2)(OMe) 3(OH). The 'hydroxy'- derivatives exist in their oxophosphaza-tautomeric forms. For the 'monohydroxy'-compounds, the presence of a pair of cis- and trans-oxophosphazadienes is established from 1H and 31P n.m.r. spectroscopic data.
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    Studies of phosphazenes. Part 25. Synthesis, nuclear magnetic resonance spectroscopy, and mode of formation of (aziridino)(triphenylphosphazenyl)cyclotriphosphazenes. X-Ray crystal structure and enzyme-inhibiting activity of N < inf > 3 < /inf > P < inf > 3 < /inf > (NPPh < inf > 3 < /inf > )(NC < inf > 2 < /inf > H < inf > 4 < /inf > ) < inf > 5 < /inf >
    ( 1985-12-01) Swamy, K. C.Kumara ; Poojary, M. Damodara ; Krishnamurthy, Setharampattu S. ; Manohar, Hattikudur
    Aziridino (HNC2H4) reacts with the triphenylphosphazenyl derivative N3P3(NPPh3)Cl5 (1) to yield the compounds N3P3(NPPh3)(NC2H4) nCl5-n [n = 1-5; (3)-(9)], the structures of which are elucidated by 1H and 31P n.m.r. spectroscopy. The fluoro-analogue, N3P3(NPPh3)F5 (2), is unreactive even under drastic conditions. The chlorine replacement pattern and the associated mechanistic aspects are discussed. The X-ray crystal structure analysis of N3P3(NPPh3)(NC2H4) 5 (9) shows a novel conformation of the -NPPh3 substituent in which one of the phenyl groups lies in a plane nearly perpendicular and in close proximity to the -NC2H4 group at the ≡P(NPPh3)(NC2H4) site. The n.m.r. [1H, 13C, and 31P] parameters of (9) are discussed in relation to its structure. The enzyme-inhibiting activity of (9) is compared with that of N3P3(NC2H4)6.