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Title: Preparation and structural investigations of new hexadentate Schiff base ligands and their bivalent metal complexes, and, catalytic applications of the complexes in allylic and benzylic C–H bond activation
Authors: Jyothi, S
Rao, G Raghava
Shashank, K
Sridhar, K
Reddy, Anjali
Someshwar, P
Swamy, S Jagannatha
Keywords: Coordination chemistry;Schiff bases;Catalytic activity;Oxidation;Benzylic oxidation;Copper;Nickel;Cobalt;Allylic oxidation
Issue Date: 19-Apr-2014
Abstract: The reaction between 2-hydroxybenzaldehyde and piperazine-1,4-diylbis((2-aminophenyl)methanone) or N,N'-(ethane-1,2-diyl)bis(2-amino-N-methyl-benzamide) yields new hexadentate Schiff base ligands, (Z)-piperazine-1,4-diylbis((2-((Z)-(2-hydroxy-benzylidene)amino)phenyl)methanone) (PHMAPM) and 2-((2-hydroxybenzylidene)amino)-N-(2-(2-((E)-(2-hydroxybenzylidene)-amino)-N-methyl-benzimido)ethyl)-N-methylbenzamide (EHBAMB) respectively. PHMAPM crystallizes in the monoclinic space group P21/C. The Co(II), Ni(II) and Cu(II) complexes of these ligands have been prepared and characterized by elemental analyses, conductance, magnetic susceptibility and spectral investigations. The complexes are found to have the formula [M(PHMAPM)] and [M(EHBAMB)] respectively. The catalytic activity of these complexes in allylic and benzylic (C–H) activation has been investigated. The Cu(II) complexes are found to exhibit better activity in acetonitrile as compared to in other solvents.
Page(s): 535-544
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.53A(04-05) [April-May 2014]

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