We carried out reactions between manganese(II) chloride dihydrate, manganese(III) acetate dihydrate and manganese(II) sulfate monohydrate with pyrazinoic acid in solvents: methanol, ethanol and acetonitrile. The reactions were carried out at room temperature or in an oil bath at a higher temperature. Crystallization was carried out in air or in a closed crystallization system at a lower pressure. With manganese(II) chloride and sulfate, we managed to synthesize two complexes [MnCl$_2$(pyzaH)$_2$] and [MnCl$_2$(pyzaH)$_2$]n·2nH$_2$O. For the reaction of manganese sulfate and pyrazinoic acid it was necessary to add concentrated hydrochloric acid. To confirm the formation of new complexes, we used analytical methods: IR spectroscopy, CHN elemental analysis, thermal analysis, X-ray powder analysis and X-ray structural analysis.
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