So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Gampe, Dominique Mario; Kaufmann, Martin; Jakobi, Doerthe; Sachse, Torsten; Presselt, Martin; Beckert, Rainer; Goerls, Helmar researched the compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile( cas:56413-95-7 ).Category: chiral-oxygen-ligands.They published the article 《Stable and Easily Accessible Functional Dyes: Dihydrotetraazaanthracenes as Versatile Precursors for Higher Acenes》 about this compound( cas:56413-95-7 ) in Chemistry – A European Journal. Keywords: dihydrotetraazaanthracene dye; chromophores; cyclization; density functional calculations; nitrogen heterocycles; sensitizers. We’ll tell you more about this compound (cas:56413-95-7).
A series of new dihydrotetraazaanthracenes and one new dihydrotetraazatetracene as substances for applications in organoelectronic devices and as suitable building blocks for higher azaacenes was synthesized. The condensation of aromatic diamines with dichlorodicyanopyrazine led to these tricyclic/tetracyclic compounds Syntheses of N-substituted phenylenediamines were developed to enable the introduction of multiple functional groups such as ester, amino, or nitro groups on the chromophoric system. Relationships between the structure and the spectroscopic properties could be derived from UV/Vis absorption and fluorescence spectroscopy, and by DFT and TD-DFT calculations of mol. and aggregate structures. The absorption spectra are dominated by π-π* transitions of the single mols., whereas aggregation needs to be taken into account to obtain reasonable agreement between theory and experiment in certain cases. Single-crystal x-ray analyses were carried out to examine the morphol. and solid packing effects. Finally, a dihydrotetraazaanthracene was used as a building-block to create a mesoionic octaazapentacene.
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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate