Studies on Mechanochemistry: Solid Coordination Compounds from Primary Aromatic Amines and Cobalt(II) Chloride Hexahydrate

Abstract

AbstractCobalt(II) chloride hexahydrate and primary aromatic amines were reacted by co‐grinding in 1:2 metal salt to ligand ratio under solvent‐free environment at room temperature. Out of 16 solid state reactions, seven cobalt‐amine complexes could be established as solid coordination compounds by elemental analysis, TGA, IR, PXRD, magnetic susceptibility etc., in addition to visual observation of the color change of reaction mixture. Based on investigation of reaction and analysis of products, conclusions with outlook could be made as follows: On top of the —NH2 group on primary aromatic amines an additional substituent group should better be at para or meta positions and not at ortho position in order to realize the solid coordination compounds. On the other hand, an electron withdrawing substituent or an extra aromatic ring is negative towards formation of the solid coordination compounds. The solid coordination Co(II)‐compounds are labile in solution.