title: Oxidation of phenyl propyne catalyzed by copper(II) complexes of a benzimidazolyl schiff base ligand: effect of acid/base, oxidant, surfactant and morphology.
abstract: Copper(II) complexes with a new N-Substituted benzimidazolyl schiff base ligand are used as catalyst for the oxidation of 1-phenyl propyne. The oxidation is carried out under mild conditions using stoichiometric amounts of oxidant and catalytic amounts of Cu(II) complex as catalyst. Effect of acid/base, oxidant, morphology and surfactant has been studied. Two major products of phenyl propyne oxidation are the α-diketonic product and a terminal aldehyde. Diketone is the major product under acidic conditions while aldehyde formation is highest under basic conditions. The maximum conversion is found with the NO3(-) bound complex. GC-MS is used to find the percentage yields of products. SEM and PXRD of the reused complexes as catalyst suggest that morphology affects the catalytic efficiency.
authors.affiliation: Department of Chemistry, University of Delhi, Delhi 110007, India.
authors.forename: Ravinder
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, University of Delhi, Delhi 110007, India. Electronic address: pavanmat@yahoo.co.in.
authors.forename: Pavan
authors.initials: P
authors.lastname: Mathur
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D001562:Benzimidazoles / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D008958:Models, Molecular; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D012545:Schiff Bases / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D000480:Alkynes; D001562:Benzimidazoles; D056831:Coordination Complexes; D016877:Oxidants; D012545:Schiff Bases; D013501:Surface-Active Agents; C043843:1-phenyl-1-propyne; D003300:Copper
keywords: Alkyne oxidation; Benzimidazole schiff base; Copper(II); Morphology