Synthesis, crystal structure and characterization of two new copper(II) complexes of Schiff bases derived from furfurylamine

Abstract

Two new mononuclear complexes of copper(II), namely [CuL 2 ] (1) and [CuL 0 2 ] (2) have been synthesized by reacting copper perchlorate with furfurylamine and salicylaldehyde or 2-hydroxyacetophenone, where L = (2-hydroxybenzyl-2-furylmethyl)imine and L 0 = (2-hydroxymethylbenzyl-2-furylmethyl)imine, the respective asymmetric bidentate Schiff bases that are formed in situ to bind the Cu(II) ion. The complexes have been characterized by elemental analysis, IR spectroscopy and single crystal X-ray diffraction studies. Structural studies reveal that the mononuclear units of both the complexes (1) and (2) adopt square planar geometry supported by weak intermolecular C-HÁÁÁp interactions.

Synthesis, 2D NMR and X-ray diffraction studies on Cu(II) and Ni(II) complexes with ligands derived from azobenzene-cored Schiff base: Mesomorphic behaviors of Cu(II)–phenolates and crystal structure of bis[4-(4-alkoxy-2-hydroxybenzylideneamino)azobenzene]copper(II)

“…The cisoid and transoid angles show that the ligands have an approximately square planar configuration around the Cu center ion. The cisoid and transoid angles are similar to the corresponding value reported by Ünvera and Hayvalib which were 91,48°, 88.52°and 180°for copper(II) complexes derived from 2-[(Z)-[furan-2-ylmethyl]imino]methyl]-6-methoxyphenol [42]. Besides, these observations are similar to the value (91.62°, 88.38°and 180°) reported by Mandal and Rout for bis(N-2-hydroxybenzyl-2-furylmethylimine)copper(II) [41].…”

“…The bond lengths of CuAN1(2.022 Å) and CuAO1(1.893 Å) are similar to the values reported by Ünvera and Hayvalib which were 2.006 (CuAN) and 1.893 (CuAO) for copper(II) complexes derived from 2-[(Z)-[furan-2-ylmethyl]imino]methyl]-6-methoxyphenol [42]. The elongated CuAN bonds have also been observed for other Schiff base complexes [41].…”

Cobalt(III) Complex [CoL3] Derived from an Asymmetric Bidentate Schiff Base Ligand L (L=(5‐Bromo‐2‐hydroxybenzyl‐2‐furylmethyl)‐imine): Synthesis, Characterization and Crystal Structure

“…The FT-IR spectra of ligand exhibits a strong band of the 12,13 The spectrum of free ligand shows strong band in 1328 and 1475 cm -1 , assigned to the C-O and C-N stretching of the ligand. However, after complexation of C-O and C-N group via oxygen and nitrogen to the cobalt ion, these bands were observed at the region of 1317 and 1456 cm -1 (Figure 1).…”

“…[8][9][10] However, reports on the preparation and characterization of transition metal complexes with bidentate Schiff base ligand derived from furfurylamine are very rare. [11][12][13] We describe here the synthesis of new mononuclear complex of Co(III) containing Schiff base ligand obtained from furfurylamine and 5-bromosalisylaldehyde (Scheme 1).…”

Physicochemical Interpretation, with QSAR/SAR Analysis, of How the Barriers Of Pseudomonas Aeruginosa Bacteria Were Penetrated by Para-Substituted N-Arylbenzylimines: Synthesis, Characterization, and In Vitro Antibacterial Effect

“…Equimolar amounts of the corresponding para-substituted anilines (1a-g) and benzaldehyde (2) diluted in 60 mL of ethanol were put in a round-bottom flask. The reaction was carried out in an acidic medium (with concentrated HCl as the catalyst) and left under reflux for 12 h. Subsequently, recrystallization was achieved by evaporating the solvent and placing the reaction crude in an ice bath [34][35]. The product was filtered under vacuum and purified by sublimation (Scheme 1).…”