Ternary copper(II) complexes of aroylhydrazones and mono/bidentate heterocycles with different structures: synthesis, crystal structure and properties

Two mixed-ligand Cu(II) complexes, [CuL1(Himdz] · CH3OH (1) and [CuL2(phen)] · 0.5DMF (2), with different structures have been synthesized by using substituted aroylhydrazones, 5-bromo-salicylaldehyde-benzoylhydrazone (H2L1) and 5-bromo-salicylaldehyde-3,5-dimethoxy-benzoylhydrazone (H2L2), and mono/bidentate heterocycles, imidazole (Himdz) and 1,10-phenanthroline (phen). Their crystal structures and spectroscopic properties have been studied. X-ray analysis show a distorted square-planar geometry for 1 and a distorted square-pyramidal geometry for 2, in which the chelating phen ligand displays axial-equatorial bonding. In both structures the ONO tridentate ligand occupies the basal plane. Self-assembly via O–H ··· N, N–H ··· O and C–H ··· O interactions lead to one-dimensional chain arrangement in 1 and 2.

[1]  S. Keller Polyhedron , 2020, Encyclopedia of Database Systems.

[2]  F. Gao,et al.  Self-assembly of copper(II) complexes with substituted aroylhydrazones and monodentate N-heterocycles: synthesis, structure and properties , 2007 .

[3]  R. Gup,et al.  Synthesis and spectroscopic studies of mixed-ligand and polymeric dinuclear transition metal complexes with bis-acylhydrazone tetradentate ligands and 1,10-phenanthroline. , 2006, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[4]  S. Pal,et al.  Copper(II) complexes with tridentate N-(benzoyl)-N′-(salicylidine)-hydrazine and monodentate N-heterocycles: Investigations of intermolecular interactions in the solid state , 2005 .

[5]  S. Pal,et al.  Self-assembly of copper(II) complexes with a dibasic tridentate ligand and monodentate N-heterocycles : structural, magnetic and EPR studies , 2005 .

[6]  S. Pal,et al.  A one-dimensional assembly of a square-planar copper(II) complex with alternating short and long Cu⋯Cu distances. Metal ion spin-exchange viaπ-π interactions , 2003 .

[7]  H. Fun,et al.  Spectral studies and structure of a 2-hydroxyacetophenone 3-hexamethyleneiminyl thiosemicarbazonate(-2) copper(II) complex containing 1,10-phenanthroline. , 2003, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[8]  W. Haase,et al.  Synthesis, magnetochemical studies and X-ray molecular structures of some mononuclear copper(II)–1H-pyrazole adducts and mono(μ-pyrazolate) bridged dicopper(II) complexes derived from N-salicylidenearoylhydrazines , 2001 .

[9]  S. Pal,et al.  Dimeric and polymeric square-pyramidal copper(II) complexes containing equatorial–apical chloride or acetate bridges , 2000 .

[10]  W. Haase,et al.  Synthesis, characterization and magnetochemical studies of some imidazole and imidazolate copper(II) ternary complexes derived from N-salicylidenearoylhydrazines. X-ray crystal and molecular structures of [(N-salicylidene-p-chlorobenzoylhydrazine)ONO(−2)imidazole]copper(II) monohydrate and dimeric [ , 2000 .

[11]  Liu Wanyi,et al.  Synthesis, characterization and electrochemical behaviour of 1′-formyl [(2,2-diferrocenyl)propane]isonicotinoyl hydrazone and its lanthanide complexes , 1999 .

[12]  J. Waters,et al.  Antitumour copper(II) salicylaldehyde benzoylhydrazone (H2sb) complexes: physicochemical properties and the single-crystal X-ray structures of [{Cu(H2sb)(CCl3CO2)2}2] and [{Cu(Hsb) (ClO4) (C2H5OH)}2] and the related salicylaldehyde acetylhydrazone (H2sa) complex, [Cu(Hsa)Cl(H2O)]·h2O , 1998 .

[13]  S. Massoud,et al.  Synthesis and characterization of nickel(II), zinc(II), copper(II), cobalt(II) and cobalt(III) complexes of α-dicarbonylbis(aroylhydrazone) , 1998 .

[14]  Z. Zhou,et al.  Synthesis and characterization of acetylferrocene pyridine-2,6-diformylhydrazone and its dinuclear yttrium and lanthanide(III) picrate complexes , 1996 .

[15]  S. Chan,et al.  Copper(II) complexes of the antitumour-related ligand salicylaldehyde acetylhydrazone (H2L) and the single-crystal X-ray structures of [{Cu(HL)H2O}2] · 2(NO3) and [{Cu(HL) (pyridine) (NO3)}2] , 1995 .

[16]  M. Carcelli,et al.  Antimicrobial and genotoxic activity of 2,6-diacetylpyridine bis(acylhydrazones) and their complexes with some first transition series metal ions. X-ray crystal structure of a dinuclear copper(II) complex. , 1995, Journal of inorganic biochemistry.