naa a22 4500 510734685 CHVBK 20180411083005.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s12039-013-0437-3 doi (NATIONALLICENCE)springer-10.1007/s12039-013-0437-3 Oxidation of hydrogen peroxide by [NiIII(cyclam)]3 +  in aqueous acidic media [Elektronische Daten] [SANKARAN ANURADHA, VENKATAPURAM VIJAYARAGHAVAN] The kinetics of oxidation of H2O2 by [NiIII(cyclam)]3 + , [NiIIIL1], was studied in aqueous acidic media at 25°C and I = 0.5 M (NaClO4). The [NiIIIL1] to [NiIIL1] reduction was found to be fast in the presence of Cu(II) ion than the oxidation of the cyclam ligand by $^{\boldsymbol{\cdot}}$ OH. The rate constant showed an inverse acid dependence on H +  ion at the pH range 1-1.5. The presence of sulphate retards the reaction. Macrocylic ligand oxidation was followed spectrophotometrically by examining the oxidation of nickel(II) complexes of macrocyclic ligands such as 1,8-bis(2-hydroxyethyl)-1,3,6,8,10,13-hexaazacyclotetradecane (L2), ms-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L3), rac-Me6[14]-4,11-dieneN4 (L4) by reaction with hydrogen peroxide. The rate constant for the cross reaction is discussed in terms of Marcus relationship. Graphical Abstract The kinetic study of oxidation of H2O2 by [Ni(cyclam)]3 + (cyclam = 1,4,8,11- tetraazacycloteradecane) was catalysed by Cu(II) ions in aqueous acidic medium and a suitable mechanism was proposed. The effect of sulphate was studied. Indian Academy of Sciences, 2013 Nickel(III) cyclam nationallicence hydrogen peroxide oxidation nationallicence Cu(II) catalyst nationallicence ANURADHA SANKARAN Department of Physical Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut VIJAYARAGHAVAN VENKATAPURAM Department of Physical Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut Journal of Chemical Sciences Springer India 125/5(2013-09-01), 1123-1132 0974-3626 125:5<1123 2013 125 12039 https://doi.org/10.1007/s12039-013-0437-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12039-013-0437-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- ANURADHA SANKARAN Department of Physical Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut NATIONALLICENCE 700 1- VIJAYARAGHAVAN VENKATAPURAM Department of Physical Chemistry, University of Madras, Guindy Campus, 600 025, Chennai, India aut NATIONALLICENCE 773 0- Journal of Chemical Sciences Springer India 125/5(2013-09-01), 1123-1132 0974-3626 125:5<1123 2013 125 12039 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer