Dianilineglyoxime Salt and Its Binuclear Zn(II) and Mn(II) Complexes with 1,3-Benzenedicarboxylic Acid: Synthesis and Structures

Abstract

Single crystals of dianilineglyoxime (DAnH₂) in the form of hydrate salts [DAnH₃](ClO₄) ∙ H₂O (I) and [DAnH₃](ClO₄) ∙ 1.25H₂O (II) are obtained. Three binuclear zinc(II) and manganese(II) compounds with dianilineglyoxime and 1,3-benzenedicarboxylic acid (1,3-Н₂Bdc) are synthesized: [Zn₂(DAnH₂)₂(1,3-Bdc)₂(DMF)₄] ∙ 2DMF ∙ MeOH · 1.5H₂O (III), [Mn₂(DAnH₂)₂(1,3-Bdc)₂(DMF)₄] ∙ 2DMF (IV), and {[Mn₂(DAnH₂)₂(1,3-Bdc)₂(DMF)₂(CH₃OH)₂][Mn₂(DAnH₂)₂(1,3-Bdc)₂(DMF)₄] ∙ 2CH₃OH} (V). The compositions and structures of compounds I–V are confirmed by IR spectroscopy and X-ray diffraction analysis (CIF files CCDC nos. 1906360 (I), 1906362 (II), 1906361 (III), 1906363 (IV), and 1906364 (V)). The X-ray diffraction data show that DAnH₂ coordinates to the metal ions via the bidentate chelate mode, whereas (1,3-Вdc)^2– coordinates to the metal ions via the bidentate bridging mode to form binuclear structures. As the most part of α-dioximes, one neutral DAnH₂ coordinates to each metal atom by two nitrogen atoms, whereas two (1,3-Вdc)^2– anions coordinate to the metal atom by one oxygen atom each. The coordination polyhedra of the metals in compounds III–V are built up by the oxygen atoms of DMF and CH₃OH.