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Jurczakowski R, Litwinienko G, Orlik M. Studies on the Formation and Kinetics of Self-Decomposition of Ni(IV)-N3
− Complexes in Aqueous Media. Z PHYS CHEM 2009. [DOI: 10.1524/zpch.2006.220.8.1083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Both electrochemical (at Pt electrode) and homogeneous (with Cl2(aq)) oxidation of the aqueous solution of Ni(II)-N3
− yields the solution of a brown product that was found to be the azide complex of Ni(IV). Its UV/Vis spectrum, consisting of a single band of high intensity (ε = 26500 cm−1 dm3 mol−1 at λmax = 471 nm), has been ascribed to the ligand-to-metal charge-transfer mechanism (LMCT). The Ni(IV)-N3
− complex undergoes spontaneous decomposition in aqueous solution, with Ni(IV) reduced back to Ni(II) and N3
− oxidized to molecular nitrogen. The first-order kinetics of this process was studied spectrophotometrically and the following parameters were found: rate constant k = 1.96×10−2 s−1, Arrhenius activation energy E
a = 82±7 kJ mol−1, standard activation enthalpy ΔH
≠0 = 79±7 kJ mol−1, and small standard activation entropy ΔS
≠0 = 10±20 J mol−1 K−1. The outline mechanism for the intramolecular redox Ni(IV)-N3
− decomposition has been suggested. Nickel ions at various oxidation states were found to be powerful catalysts for the redox processes of azide ions.
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Orlik M, Jurczakowski R. The kinetic parameters of the electrocatalytic reduction of the coordinated azide anions found from comparison of dc and ac measurements for the tristable system. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2007.11.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Jurczakowski R, Orlik M. The electroreduction of azides bound to nickel(II) ions in weak acidic media. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2004.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Jurczakowski R, Orlik M. Experimental and Theoretical Studies of the Multistability in the Electroreduction of the Nickel(II)−N3- Complexes at a Streaming Mercury Electrode. J Phys Chem B 2003. [DOI: 10.1021/jp0349482] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafał Jurczakowski
- Laboratory of Electroanalytical Chemistry, Department of Chemistry, University of Warsaw, ul. Pasteura 1, PL-02-093 Warsaw, Poland
| | - Marek Orlik
- Laboratory of Electroanalytical Chemistry, Department of Chemistry, University of Warsaw, ul. Pasteura 1, PL-02-093 Warsaw, Poland
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Iha M, De Almeida Neves EF. The formation of polynuclear stepwise complexes of nickel(II) with azide ions. Polyhedron 1992. [DOI: 10.1016/s0277-5387(00)86007-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Elżanowska H, van de Sande J. Complexation of bases and phosphates of nucleic acid components by transition metal ions. J Electroanal Chem (Lausanne) 1988. [DOI: 10.1016/0022-0728(88)87079-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Complexation of bases and phosphates of nucleic acid components by transition metal ions. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0302-4598(88)80023-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Pihlar B, Valenta P, Nürnberg H. Electrochemical reduction of Ni(II) on the hanging mercury drop electrode in the presence of dimethylglyoxime. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0022-0728(86)80094-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Borodziński JJ, Galus Z. Influence of water activity on the Ni(II)/Ni(Hg) electrode reaction in concentrated Ca(ClO4)2 solutions in the temperature range 20–185°C. ACTA ACUST UNITED AC 1982. [DOI: 10.1016/0368-1874(82)85122-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tokoro R, Neves EA. Catalytic polarographic wave of cobalt(II) in sodium azide with hydrazoic acid. ACTA ACUST UNITED AC 1981. [DOI: 10.1016/s0022-0728(81)80328-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Electrode reactions of nickel(II) at mercury electrodes in aqueous solutions of pyridine at high ionic strengths. Electrochim Acta 1975. [DOI: 10.1016/0013-4686(75)90009-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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On the formation of sulphides in the electroreduction of thiocyanate complexes of nickel(II) at mercury electrodes. ACTA ACUST UNITED AC 1974. [DOI: 10.1016/s0022-0728(74)80007-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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