Chemistry is traditionally divided into organic and inorganic chemistry. Quality Control of 2-Ethoxypyrazine, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 38028-67-0
The investigation into synthesizing new metal organic compounds with the general formula Cu(S-pyrazine)X2 using monosubstituted pyrazines has led to the generation of a new family of compounds Cu(S-pyrazine) 2X2 with similar structure and magnetic properties. The bis(S-pyrazine)dihalocopper(ii) compounds [where S = Cl, CN, OCH3, and OCH2CH3 and halide = Cl or Br] have been characterized by IR, powder X-ray diffraction, single-crystal X-ray diffraction, and temperature dependent magnetic susceptibility. The bis(chloropyrazine) dihalocopper(ii) compounds crystallize in the monoclinic space group P2 1/n while the methoxy and ethoxy analogues crystallize in the triclinic space group P1. This structurally related family of compounds exhibit antiferromagnetic interactions with exchange constants of approximately -25 K for the chloride analogues and -50 K for the bromide analogues.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N508 – PubChem