1D polymeric copper(II) complexes containing bridging tridentate pyrazinato and terminal chloro or azido anions. Synthesis, spectral, structural and thermal study of [CuCl(pyrazinato)(H2O)]n and [Cu(N3)(pyrazinato)(H2O)]n complexes was written by Goher, Mohamed A. S.;Abu-Youssef, Morsy A. M.;Mautner, Franz A.. And the article was included in Polyhedron in 1998.Formula: C7H8N2O2 This article mentions the following:
Polymeric [CuCl(pyrazinato)(H2O)]n (1) and [Cu(N3)(pyrazinato)(H2O)]n (2) were synthesized and characterized by spectroscopic methods and x-ray crystallog. (1: monoclinic, space group P21/n, R1 = 0.0368; 2: monoclinic, space group I2/a, R1 = 0.0908). The overall spectral results indicate that these complexes contain tridentate pyrazinato ligands, terminal chloride or azide groups and aqua mols. In the structure of complex 1, each copper atom, which is chelated by oxygen and nitrogen atoms of a pyrazinato anion, links a chloride, an oxygen atom from an aqua mol. and the 2nd nitrogen from a pyrazinato group of a neighboring unit giving rise to a 1-dimensional polymeric structure. The structure of complex 2, which is very similar to 1, features a five coordinate copper(II) atom, a N,N,O-tridentate bridging pyrazinato ligand, a terminal azido ligand and an aqua mol. in a 1-dimensional polymer. There are different types of hydrogen bonds in both complexes. The thermal decomposition of 1 and 2 was studied thermogravimetrically in nitrogen atm. In the experiment, the researchers used many compounds, for example, Ethyl pyrazine-2-carboxylate (cas: 6924-68-1Formula: C7H8N2O2).
Ethyl pyrazine-2-carboxylate (cas: 6924-68-1) belongs to pyrazine derivatives. Pyrazine is an N-heterocyclic moiety, and it can be easily prepared from ethylenediamine and 1,2-diketone, α-hydroxyketone, α-methyl ketone. A large number of pyrazine derivatives are known for their antitumor, antibiotic, anticonvulsant, antituberculosis, and diuretic activities.Formula: C7H8N2O2