title: Pd(II) complexes based on quinoline derivative: structural characterization and their role as a catalyst for hydrogenation of (E)-1-methyl-4-(2-nitrovinyl)benzene.
abstract: A series of two new Pd(II) complexes with ligand, HL, (z)-2-((quinolin-3-ylimino)methyl)phenol, derived from 3-aminoquinoline and 2-hydroxybenzaldehyde was reported. The structure of ligand, HL was determined by single crystal X-ray diffraction. The ligand, HL crystallizes in the space group P21/n of the monoclinic system with unit cell dimensions a=8.8733(8), b=6.3318(5), c=11.5145(9). The reaction of ligand, HL with PdX2 [X=Cl(-), OAc] in 2:1molar ratio yielded complexes of the type [Pd(HL)2X2] [X=Cl(-), OAc]. The ligand, HL and its Pd(II) complexes were characterized by various physico-chemical techniques; elemental analyses, ionization mass spectrometry (ESI-MS), UV/Vis, FT-IR, (1)H and (13)C NMR spectroscopy. UV/Vis absorption studies showed a square planar geometry around Pd (II) ion. The selective hydrogenation of (E)-1-methyl-4-(2-nitrovinyl)benzene in ethanol using synthesized Pd(II) complexes as catalysts was investigated at room temperature. The Pd(II) complexes catalyzed the hydrogenation of (E)-1-methyl-4-(2-nitrovinyl)benzene to (E)-1-methyl-4-(2-aminovinyl) benzene. Furthermore, the catalytic activity increased with increasing the quantity of Pd(II) complexes as catalysts.
authors.affiliation: Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia. Electronic address: azam_res@yahoo.com.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Azam
authors.affiliation: Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
authors.forename: Mohammad Shahidul
authors.initials: MS
authors.lastname: Islam
authors.affiliation: Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
authors.forename: Saud I
authors.initials: SI
authors.lastname: Al-Resayes
authors.affiliation: Department of Chemistry, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
authors.forename: M
authors.initials: M
authors.lastname: Rafiq Siddiqui
authors.affiliation: Department of X-ray Crystallography and Crystal Chemistry, Institute of General and Ecological Chemistry, Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland.
authors.forename: Agata
authors.initials: A
authors.lastname: Trzesowska-Kruszynska
authors.affiliation: Department of X-ray Crystallography and Crystal Chemistry, Institute of General and Ecological Chemistry, Technical University of Lodz, Zeromskiego 116, 90-924 Lodz, Poland.
authors.forename: Rafal
authors.initials: R
authors.lastname: Kruszynski
mesh_terms: D001555:Benzene Derivatives / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006865:Hydrogenation; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008958:Models, Molecular; D010165:Palladium / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D011804:Quinolines / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D001555:Benzene Derivatives; D056831:Coordination Complexes; D010636:Phenols; D011804:Quinolines; D010165:Palladium; C037219:quinoline
keywords: (z)-2-((Quinolin-3-ylimino)methyl)phenol; Crystal structure; Hydrogenation; Pd(II) complexes