Manganese(II) ions as stereochemical probes in reactions of zinc halides with pyrazine
Abstract
Pyrazine is shown to form complexes [Zn(pyz)2X2](pyz = pyrazine, X = Cl or Br) as well as the previously known [Zn(pyz)X2]. E.s.r. spectra of these compounds doped with manganese(II) ions show the stereochemistry to be polymeric with pyrazine bridges, and the doping technique permits identification of the complexes even in mixtures.