Journal ArticleDOI
The ‘inverse electron-demand' Diels–Alder reaction in polymer synthesis. Part 4.1 The preparation and crystal structures of some bis(1,2,4,5-tetrazines)
TLDR
In this article, the crystal structures of two of these atoms show electronic interaction between the tetrazine rings and the amino groups, but none between the pyrazine and pyrazole rings.Abstract:
Reaction of 3,6-bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine with
mono- and di-amines gives rise to nucleophilic substitution of one or
both of the pyrazolyl substituents, and reaction with diamines under
appropriate conditions can lead to bis(3-amino-1,2,4,5-tetrazines),
e.g. 12a, 12b and 13. The crystal structures of two of these
(12a and 13) show electronic interaction between the tetrazine rings and
the amino groups, but none between the tetrazine and pyrazole rings. In
12a there is an extensive network of
N–H · · ·
N hydrogen bonds.read more
Citations
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Journal ArticleDOI
Synthesis and Physical Chemistry of s-Tetrazines: Which Ones are Fluorescent and Why?
Yong-Hua Gong,Yong-Hua Gong,Fabien Miomandre,Rachel Méallet-Renault,Sophie Badré,Laurent Galmiche,Jie Tang,Pierre Audebert,Gilles Clavier +8 more
TL;DR: In this article, the occurrence of fluorescence as well as the wavelength were found to be strongly dependent on the substituents, which have to be electronegative heteroatoms.
Journal ArticleDOI
Novel high-nitrogen materials based on nitroguanyl-substituted tetrazines.
TL;DR: The synthesis and properties of several novel high-nitrogen materials based on nitroguanyl-substituted tetrazines are described and an optimized procedure provides straightforward access to these materials in multigram quantities.
Journal ArticleDOI
Tetrazine functionalized zirconium MOF as an optical sensor for oxidizing gases.
TL;DR: Dihydro-1,2,4,5-tetrazine-3,6-dicarboxylate was introduced into the chemically stable UiO-66 structure by a postsynthetic linker exchange reaction to create an optical sensor material for the detection of oxidative agents such as nitrous gases.
Journal ArticleDOI
Synthesis and characterization of 3,6-bis(1H-1,2,3,4-tetrazol-5-ylamino)-1,2,4,5-tetrazine (BTATz): Novel high-nitrogen content insensitive high energy material
TL;DR: The synthesized BTATz and TADPTz have been characterized by spectroscopic techniques and the data obtained confirm their structure and the computed volume of gases indicates that they can find application in gas generating compositions.
Journal ArticleDOI
Isovalent and Mixed-Valent Diruthenium Complexes [(acac)2RuII (μ-bpytz)RuII(acac)2] and [(acac)2RuII(μ-bpytz)RuIII(acac)2](ClO4) (acac = Acetylacetonate and bpytz = 3,6-Bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine): Synthesis, Spectroelectrochemical, and EPR Investigation
Srikanta Patra,Biprajit Sarkar,Sandeep Ghumaan,Jan Fiedler,Wolfgang Kaim,Goutam Kumar Lahiri +5 more
TL;DR: The title compounds involving the structurally characterized bridging ligand bpytz were characterized, showing very strong electrochemical stabilization of the mixed-valent RuIIRuIII state but no detectable intervalence charge-transfer band in the infrared region.
References
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Journal ArticleDOI
Patterns in Hydrogen Bonding: Functionality and Graph Set Analysis in Crystals
TL;DR: In this article, a review of the most promising systematic approaches to resolving this enigma was initially developed by the late M. C. Etter, who applied graph theory to recognize, and then utilize, patterns of hydrogen bonding for the understanding and design of molecular crystals.
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Completion and refinement of crystal structures with SIR92
TL;DR: In this paper, an automatic procedure for recovering a complete crystal structure after a direct phasing process is described, which consists mainly of a Fourier recycling method that can be implemented in any direct-methods package.
Journal ArticleDOI
Encoding and decoding hydrogen-bond patterns of organic compounds
Journal ArticleDOI
An improved synthesis of 3,6-diamino-1,2,4,5-tetrazine. II: From triaminoguanidine and 2,4-pentanedione
Michael D. Coburn,G. A. Buntain,Betty W. Harris,Michael A. Hiskey,Kien-Yin Lee,Donald G. Ott +5 more
TL;DR: A new synthesis for triaminoguanidine monohydrochloride gave an 80% overall yield as mentioned in this paper, which was developed for the title compound that gives an 80 % overall yield.
Journal ArticleDOI
Experimental and theoretical determination of the crystal structure of 3,6-diphenyl-s-tetrazine
N.A. Ahmed,A.I. Kitaigorodsky +1 more
TL;DR: In this article, a planar 3,6-Diphenyl-s-tetrazine was determined experimentally by X-ray three-dimensional analysis and the packing position of the molecule was carried out using the atom-atom potentials method.