Application In Synthesis of 5,6-Dichloropyrazine-2,3-dicarbonitrile. 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. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Dicyanopyrazine studies. part IV: syntheses and solid state absorption spectra of new dicyanopyrazine dyes derived from dichlorodicyanopyrazine and Fischer’s type bases.
2-Chloro-5,6-dicyano-3-[2-(1,3,3-trimethylindolinylidene)methyl]pyrazine showed large differences in λmax from solution to the solid state resulting from strong intermol. π-π interactions. Related derivatives were synthesized by the nucleophilic substitution of 2,3-dichloro-5,6-dicyanopyrazine with various Fischer’s base type enamines. Absorption spectra, fluorescent properties and other phys. properties were correlated with their chem. structures. The PPP MO and MOPAC approach to evaluate their absorption spectra correlate with their conformations were conducted. Good correlation between the calculated and the exptl. results were obtained. The substituent effects of dicyanopyrazines affecting their chem., electronic, and phys. properties were also studied.
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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