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.Hamdoush, Mahmoud; Ivanova, Svetlana S.; Koifman, Oskar I.; Kos’kina, Marina; Pakhomov, Georgy L.; Stuzhin, Pavel A. researched the compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile( cas:56413-95-7 ).Related Products of 56413-95-7.They published the article 《Synthesis, spectral and electrochemical study of perchlorinated tetrapyrazinoporphyrazine and its AlIII, GaIII and InIII complexes》 about this compound( cas:56413-95-7 ) in Inorganica Chimica Acta. Keywords: preparation aluminum gallium indium perchlorinated tetrapyrazinoporphyrazine complex; cyclic voltammetry aluminum gallium indium perchlorinated tetrapyrazinoporphyrazine complex. We’ll tell you more about this compound (cas:56413-95-7).
Complexes of octachloro substituted tetrapyrazinoporphyrazine with AlIII, GaIII and InIII (2a-c, (I: 2, 4, and 5)) were synthesized by direct melting of 5,6-dichloro-2,3-dicarbonitrile (1) with corresponding metal salt (AlIII chloride, GaIII and InIII hydroxydiacetates). Metal free macrocycle (II: 3) was prepared by catalytic demetalation of the InIII complex 2c (5) in the presence of chloride ions. Introduction of eight chlorine atoms to the peripheral positions of the TPyzPA macrocycle leads to a bathochromic shift of the Q band by 10-15 nm indicating narrowing of the HOMO-LUMO gap by 210-260 cm-1. The presence of eight electroneg. chlorine atoms facilitates the reduction of the TPyzPA macrocycle leading to the considerable pos. shift of the 1st reduction potentials for the metal complexes 2a-c (2, 4, and 5)(E1/2 approx. -0.16 V vs. Ag/AgCl in DMSO) and for the metal free macrocycle 3 (E1/2 = -0.04 V vs. Ag/AgCl in DMSO).
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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