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Original scientific paper

Equilibria in Complexes of N-Heterocycles. Part 50.1 The Formation and Properties in Solution of the 1:1 Adducts of Bis(2,2'-bipyridine)platinum(II) and Related Ions with Hydroxide

Armanda Maria Formigao Gameiro ; Department of Chemistry, University of Wales, P.O. Box 912, Cardiff CF1 3TB, U.K.
Robert D. Gillard ; Department of Chemistry, University of Wales, P.O. Box 912, Cardiff CF1 3TB, U.K.
Norman H. Rees ; Department of Chemistry, University of Wales, P.O. Box 912, Cardiff CF1 3TB, U.K.
Jurgen Schulte ; Department of Chemistry, University of Wales, P.O. Box 912, Cardiff CF1 3TB, U.K.
Abdurrahman Sengül ; Department of Chemistry, University of Wales, P.O. Box 912, Cardiff CF1 3TB, U.K.

Fulltext: english, pdf (191 KB) pages 641-665 downloads: 451* cite
APA 6th Edition
Formigao Gameiro, A.M., Gillard, R.D., Rees, N.H., Schulte, J. & Sengül, A. (2001). Equilibria in Complexes of N-Heterocycles. Part 50.1 The Formation and Properties in Solution of the 1:1 Adducts of Bis(2,2'-bipyridine)platinum(II) and Related Ions with Hydroxide. Croatica Chemica Acta, 74 (3), 641-665. Retrieved from https://hrcak.srce.hr/131884
MLA 8th Edition
Formigao Gameiro, Armanda Maria, et al. "Equilibria in Complexes of N-Heterocycles. Part 50.1 The Formation and Properties in Solution of the 1:1 Adducts of Bis(2,2'-bipyridine)platinum(II) and Related Ions with Hydroxide." Croatica Chemica Acta, vol. 74, no. 3, 2001, pp. 641-665. https://hrcak.srce.hr/131884. Accessed 23 Apr. 2021.
Chicago 17th Edition
Formigao Gameiro, Armanda Maria, Robert D. Gillard, Norman H. Rees, Jurgen Schulte and Abdurrahman Sengül. "Equilibria in Complexes of N-Heterocycles. Part 50.1 The Formation and Properties in Solution of the 1:1 Adducts of Bis(2,2'-bipyridine)platinum(II) and Related Ions with Hydroxide." Croatica Chemica Acta 74, no. 3 (2001): 641-665. https://hrcak.srce.hr/131884
Harvard
Formigao Gameiro, A.M., et al. (2001). 'Equilibria in Complexes of N-Heterocycles. Part 50.1 The Formation and Properties in Solution of the 1:1 Adducts of Bis(2,2'-bipyridine)platinum(II) and Related Ions with Hydroxide', Croatica Chemica Acta, 74(3), pp. 641-665. Available at: https://hrcak.srce.hr/131884 (Accessed 23 April 2021)
Vancouver
Formigao Gameiro AM, Gillard RD, Rees NH, Schulte J, Sengül A. Equilibria in Complexes of N-Heterocycles. Part 50.1 The Formation and Properties in Solution of the 1:1 Adducts of Bis(2,2'-bipyridine)platinum(II) and Related Ions with Hydroxide. Croatica Chemica Acta [Internet]. 2001 [cited 2021 April 23];74(3):641-665. Available from: https://hrcak.srce.hr/131884
IEEE
A.M. Formigao Gameiro, R.D. Gillard, N.H. Rees, J. Schulte and A. Sengül, "Equilibria in Complexes of N-Heterocycles. Part 50.1 The Formation and Properties in Solution of the 1:1 Adducts of Bis(2,2'-bipyridine)platinum(II) and Related Ions with Hydroxide", Croatica Chemica Acta, vol.74, no. 3, pp. 641-665, 2001. [Online]. Available: https://hrcak.srce.hr/131884. [Accessed: 23 April 2021]

Abstracts
Equilibrium constants are given for addition (mol ratio 1:1) of hy-droxide to several palladium(II) and platimim(II) cations. [Pt(bpy)2]2+ (bpy: 2,2’-bipyridine) and hydroxide ion form the well-known 1:1 adduct rapidly in water; the rate is given at 25 °C by k = 1.6 × 102 mol-1 dm3 s-1. The equilibrium constants for adding hydroxide to [Pt(bpy)2]2+ and to [Pt(3,3’-[2H]2-bpy)2]2+ are the same, but differ considerably from those for [Pt([2H]8-bpy)2]2+ and for [Pt(6,6'-[2H]2-bpy)2]2+ with hydroxide. In this reaction, the infrared spectrum (1700-900 cm-1) of the cation initially [Pt(bpy)2]2+ in the aqueous solution shows distinct changes between pH = 7.0 and pH = 11.0, notably in the aromatic region, where the intensity of the band due to C=N at ca. 1600 cm-1 is much reduced. At pH = 7.0, the methyl groups in [Pt(5,5’-dmbpy)2]2+ (dmbpy: dimethyl-2,2'-bipyridine) or the 4,4'-isomer are equivalent in magnetic resonance but become inequivalent in the 1:1 adducts with hydroxide. In the presence of (−)-methylbenzylamine, both [Pt(terpy)Cl]Cl (terpy: 2,2',2"-ter-pyridine) and [Pt(bpy)2]2+ manifest a strong Pfeiffer effect, but not the exciton coupling characteristic of cis-octahedral ions. These observations are interpreted in terms of addition of hydroxide to the bipyridine ligands.

Keywords
platinum(II); palladium(II); complexes with padine (py); 2,2'-bipyridine (bipy); 1,10-phenanthroline (phen); 2,2',2"-terpyridine (terpy); equilibrium constant with hydroxide; electronic spectra (UV-Vis, CD); NMR spectra 13C, 195Pt); deuterium substitution; kinetic isotope effect; Pfeiffer effect; Cotton effect

Hrčak ID: 131884

URI
https://hrcak.srce.hr/131884

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