The oxidation of nickelII (1,4,8,11-tetraazacyclotetradecane) by hydroperoxyl radicals: A pulse radiolysis study

Avraham Meshulam; Haim Cohen; Dan Meyerstein

doi:10.1016/s0020-1693(97)05968-9

The oxidation of nickel^II (1,4,8,11-tetraazacyclotetradecane) by hydroperoxyl radicals: A pulse radiolysis study

Avraham Meshulam
, Haim Cohen
, Dan Meyerstein

Department of Chemical Sciences

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Hydroperoxyl radicals oxidize NiL²⁺ in solutions containing SO₄^2- and H₂PO₄^- to (LNi^III(SO₄)₂) and (LNi^III(H₂PO₄)₂) ⁺. The mechanism of these processes involves mainly the following reactions: NiL²⁺ + HO₂^•⇆L(H₂O)Ni^III(HO ₂^-)²⁺ L(H₂O)Ni^III(HO₂^-)²⁺ + X^- ⇆ LNi^III(X^-)(HO₂^-) ⁺ LNi^III(X^-)(HO₂^-)⁺ + X^- + H₃O⁺ → LNi^III(X^-)₂⁺ + H₂O₂ This mechanism differs from that observed for the analogous oxidation of Ni(5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)^2,4. The difference in the mechanisms stems from the difference in the redox potentials of the complexes.

Original language	English
Pages (from-to)	266-269
Number of pages	4
Journal	Inorganica Chimica Acta
Volume	273
Issue number	1-2
DOIs	https://doi.org/10.1016/s0020-1693(97)05968-9
State	Published - 15 May 1998

Keywords

Azamacrocycle complexes
Hydroperoxyl radicals
Nickel complexes
Oxidation

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10.1016/s0020-1693(97)05968-9

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@article{f15cc5c88d26495193f70030a450db1c,

title = "The oxidation of nickelII (1,4,8,11-tetraazacyclotetradecane) by hydroperoxyl radicals: A pulse radiolysis study",

abstract = "Hydroperoxyl radicals oxidize NiL2+ in solutions containing SO42- and H2PO4- to (LNiIII(SO4)2) and (LNiIII(H2PO4)2) +. The mechanism of these processes involves mainly the following reactions: NiL2+ + HO2•⇆L(H2O)NiIII(HO 2-)2+ L(H2O)NiIII(HO2-)2+ + X- ⇆ LNiIII(X-)(HO2-) + LNiIII(X-)(HO2-)+ + X- + H3O+ → LNiIII(X-)2+ + H2O2 This mechanism differs from that observed for the analogous oxidation of Ni(5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)2,4. The difference in the mechanisms stems from the difference in the redox potentials of the complexes.",

keywords = "Azamacrocycle complexes, Hydroperoxyl radicals, Nickel complexes, Oxidation",

author = "Avraham Meshulam and Haim Cohen and Dan Meyerstein",

note = "Funding Information: This study was supported in part by a grant from the Budgeting and Planning Committee of The Council of Higher Education and the Israel Atomic Energy Commission. D.M. wishes to express his thanks to Mrs Irene Evens for her ongoing interest and support.",

year = "1998",

month = may,

day = "15",

doi = "10.1016/s0020-1693(97)05968-9",

language = "אנגלית",

volume = "273",

pages = "266--269",

journal = "Inorganica Chimica Acta",

issn = "0020-1693",

publisher = "Elsevier B.V.",

number = "1-2",

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TY - JOUR

T1 - The oxidation of nickelII (1,4,8,11-tetraazacyclotetradecane) by hydroperoxyl radicals

T2 - A pulse radiolysis study

AU - Meshulam, Avraham

AU - Cohen, Haim

AU - Meyerstein, Dan

N1 - Funding Information: This study was supported in part by a grant from the Budgeting and Planning Committee of The Council of Higher Education and the Israel Atomic Energy Commission. D.M. wishes to express his thanks to Mrs Irene Evens for her ongoing interest and support.

PY - 1998/5/15

Y1 - 1998/5/15

N2 - Hydroperoxyl radicals oxidize NiL2+ in solutions containing SO42- and H2PO4- to (LNiIII(SO4)2) and (LNiIII(H2PO4)2) +. The mechanism of these processes involves mainly the following reactions: NiL2+ + HO2•⇆L(H2O)NiIII(HO 2-)2+ L(H2O)NiIII(HO2-)2+ + X- ⇆ LNiIII(X-)(HO2-) + LNiIII(X-)(HO2-)+ + X- + H3O+ → LNiIII(X-)2+ + H2O2 This mechanism differs from that observed for the analogous oxidation of Ni(5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)2,4. The difference in the mechanisms stems from the difference in the redox potentials of the complexes.

AB - Hydroperoxyl radicals oxidize NiL2+ in solutions containing SO42- and H2PO4- to (LNiIII(SO4)2) and (LNiIII(H2PO4)2) +. The mechanism of these processes involves mainly the following reactions: NiL2+ + HO2•⇆L(H2O)NiIII(HO 2-)2+ L(H2O)NiIII(HO2-)2+ + X- ⇆ LNiIII(X-)(HO2-) + LNiIII(X-)(HO2-)+ + X- + H3O+ → LNiIII(X-)2+ + H2O2 This mechanism differs from that observed for the analogous oxidation of Ni(5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)2,4. The difference in the mechanisms stems from the difference in the redox potentials of the complexes.

KW - Azamacrocycle complexes

KW - Hydroperoxyl radicals

KW - Nickel complexes

KW - Oxidation

UR - https://www.scopus.com/pages/publications/0041193034

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DO - 10.1016/s0020-1693(97)05968-9

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AN - SCOPUS:0041193034

SN - 0020-1693

VL - 273

SP - 266

EP - 269

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

IS - 1-2

ER -

The oxidation of nickel^II (1,4,8,11-tetraazacyclotetradecane) by hydroperoxyl radicals: A pulse radiolysis study

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