Structural diversity and properties of four complexes with 4-acyl pyrazolone derivative

Four new complexes {[Zn(HL)(H2O)(DMF)](NO3)}n (1), [Cd(HL)2]n (2), {[Mn(HL)2]·CH3CN·2H2O} (3) and {[Mn(L)(μ2-EtOH)]}n (4) (H2L = N-(1-phenyl-3-methyl-4-benzal-pyrazolone-5)-nicotinic hydrazide) have been synthesized and characterized by elemental analyses, IR spectra, thermal analyses and single crystal X-ray diffraction. The structural analyses reveal that complexes 1, 2 and 3, formed by H2L with metal nitrate, have Zigzag chain, double-stranded chain and mononuclear structures, respectively, and the ligands adopt three different coordination modes in these complexes. While, complex 4, formed by H2L with manganese acetate, represents a 2D network structure with dinuclear units bridged by ethanol molecules. These result demonstrated that the metal atom and counteranion have certain influences on the structures of resulting complexes. In addition, the fluorescent properties of 1 and 2 and the magnetism of 4 were investigated.

Four complexes with different structures were constructed from corresponding metal atoms with 4-acyl pyrazolone derivative, and the ligands show three different coordination modes in these complexes. Furthermore, the fluorescent properties of 1–2 and magnetism of 4 are investigated.Figure optionsDownload as PowerPoint slide