The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Structure-Property Relationships and Nonlinear Optical Effects in Donor-Substituted Dicyanopyrazine-Derived Push-Pull Chromophores with Enlarged and Varied π-Linkers》. Authors are Bures, Filip; Cermakova, Hana; Kulhanek, Jiri; Ludwig, Miroslav; Kuznik, Wojciech; Kityk, Iwan V.; Mikysek, Tomas; Ruzicka, Ales.The article about the compound:5,6-Dichloropyrazine-2,3-dicarbonitrilecas:56413-95-7,SMILESS:N#CC1=NC(Cl)=C(Cl)N=C1C#N).Formula: C6Cl2N4. Through the article, more information about this compound (cas:56413-95-7) is conveyed.
Thirteen new, stable, push-pull systems featuring dimethylamino and pyrazine-2,3-dicarbonitrile moieties as the donor and acceptor, resp., and systematically extended and varied π-linkers were prepared and studied. Evaluation of the measured UV/Vis spectra, electrochem. data (cyclic voltammetry, rotating disk voltammetry, and polarog.), x-ray data, and exptl. determined and calculated hyperpolarizability values enabled structure-property studies; these revealed some important structural features that affected the efficiency of intramol. charge-transfer and nonlinear optical properties in this class of heterocyclic push-pull chromophores. The charge-transfer transition was most significantly affected by structural features such as π-linker length, chromophore planarity, and the number of 1,4-phenylene/ethynylene subunits in the π-linker.
Here is a brief introduction to this compound(56413-95-7)Formula: C6Cl2N4, if you want to know about other compounds related to this compound(56413-95-7), you can read my other articles.
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