Difference in the stabilities of the diastereoisomers of the tervalent nickel complex with 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane in sulfate- and perchlorate-containing aqueous solutions. An electrochemical and pulse radiolysis study

Zeigerson, E.; Ginzburg, Gregory; Becker, James Y.; Kirschenbaum, Louis J.; Cohen, Haim; Meyerstein, Dan

doi:10.1021/ic50225a078

Cited by 36 publications

(24 citation statements)

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“…The results indicate that the p K a s of the bound amines are ⩾ 10. The latter finding is in agreement with the suggestion that the secondary amines of the macrocyclic ligands in the Ni III complexes have p K a values > 10 8…”

Section: Resultssupporting

confidence: 92%

Oxidation of CH₃NH₂ and (CH₃)₂NH by Ni^III(cyclam)(H₂O)₂³⁺ in Aqueous Solutions

et al. 2004

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Section: Resultssupporting

confidence: 92%

Oxidation of CH₃NH₂ and (CH₃)₂NH by Ni^III(cyclam)(H₂O)₂³⁺ in Aqueous Solutions

et al. 2004

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“…6 relatively fast in a second-order process. [12][13][14] In order to inhibit the last reaction it seemed that the preferred route of preparing the column is by the sol-gel entrapment procedure.…”

Section: A C H T U N G T R E N N U N G (H 2 O) 2 ]mentioning

confidence: 99%

Electron Exchange Columns through Entrapment of a Nickel Cyclam in a Sol–Gel Matrix

Lavi

Burg

Maimon

et al. 2011

Chemistry A European J

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An electron exchange column (analogous to ion exchange columns) was developed using the unique redox properties of the nickel-tetraazamacrocyclic complexes (nickel cyclam [Ni(II)L(1)](2+)) and nickel-trans-III-meso-5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane, ([Ni(II)L(2)](2+)), and the physical and chemical stability of the ceramic materials using the sol-gel process to entrap the complexes. The entrapment by the biphasic sol-gel method is based on non-covalent bonds between the matrix and the complex; therefore the main problem was leaching. Parameters controlling the leaching were investigated. Redox cycles with the reducing agent ascorbic acid, and persulfate as the oxidizing agent were performed.

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“…[14] This conclusion is in agreement with the observation that the stabilities of the isomers of Ni III (5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraaazacyclotetradecane) differ considerably. [15] …”

Section: Oxidation Of the Complex By Br 2 ·-Ion Radicalsmentioning

confidence: 99%

The Redox Chemistry of (N¹‐[3‐(2‐aminoethylimino)‐1,1‐dimethylbutyl]ethane‐1,2‐diamine)nickel(II) Perchlorate, Ni^IIL¹(ClO₄)₂, in Aqueous Solutions –A Pulse Radiolytic and an Electrochemical Study

et al. 2005

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The ligand (N1‐[3‐(2‐aminoethylimino)‐1,1‐dimethylbutyl]ethane‐1,2‐diamine), L1, induces a high ligand field on the central NiII ion. Thus it is relatively easy to oxidize(NiIIL1)2+. However, the kinetic stability of the NiIIIL1 complexes is considerably lower than that of their analogous macrocyclic complexes. This difference in stabilities isattributed to the less rigid ligand framework, which facilitates the oxidation of ligand. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)

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Difference in the stabilities of the diastereoisomers of the tervalent nickel complex with 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane in sulfate- and perchlorate-containing aqueous solutions. An electrochemical and pulse radiolysis study

Cited by 36 publications

References 1 publication

Oxidation of CH₃NH₂ and (CH₃)₂NH by Ni^III(cyclam)(H₂O)₂³⁺ in Aqueous Solutions

Oxidation of CH₃NH₂ and (CH₃)₂NH by Ni^III(cyclam)(H₂O)₂³⁺ in Aqueous Solutions

Electron Exchange Columns through Entrapment of a Nickel Cyclam in a Sol–Gel Matrix

The Redox Chemistry of (N¹‐[3‐(2‐aminoethylimino)‐1,1‐dimethylbutyl]ethane‐1,2‐diamine)nickel(II) Perchlorate, Ni^IIL¹(ClO₄)₂, in Aqueous Solutions –A Pulse Radiolytic and an Electrochemical Study

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Difference in the stabilities of the diastereoisomers of the tervalent nickel complex with 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane in sulfate- and perchlorate-containing aqueous solutions. An electrochemical and pulse radiolysis study

Cited by 36 publications

References 1 publication

Oxidation of CH3NH2 and (CH3)2NH by NiIII(cyclam)(H2O)23+ in Aqueous Solutions

Oxidation of CH3NH2 and (CH3)2NH by NiIII(cyclam)(H2O)23+ in Aqueous Solutions

Electron Exchange Columns through Entrapment of a Nickel Cyclam in a Sol–Gel Matrix

The Redox Chemistry of (N1‐[3‐(2‐aminoethylimino)‐1,1‐dimethylbutyl]ethane‐1,2‐diamine)nickel(II) Perchlorate, NiIIL1(ClO4)2, in Aqueous Solutions –A Pulse Radiolytic and an Electrochemical Study

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Oxidation of CH₃NH₂ and (CH₃)₂NH by Ni^III(cyclam)(H₂O)₂³⁺ in Aqueous Solutions

Oxidation of CH₃NH₂ and (CH₃)₂NH by Ni^III(cyclam)(H₂O)₂³⁺ in Aqueous Solutions

The Redox Chemistry of (N¹‐[3‐(2‐aminoethylimino)‐1,1‐dimethylbutyl]ethane‐1,2‐diamine)nickel(II) Perchlorate, Ni^IIL¹(ClO₄)₂, in Aqueous Solutions –A Pulse Radiolytic and an Electrochemical Study