Bu site altında yer alan tüm kaynaklar Creative Commons Alıntı-GayriTicari-Türetilemez 4.0 Uluslararası Lisansı ile lisanslanmıştır.
Equilibrium constants are given for addition (mol ratio 1:1) of hydroxide to several palladium(II) and platinum(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 1H 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¨-terpyridine) 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.
| Yazar |
Gameiro A.M.F. Gillard R.D. Rees N.H. Schulte J. Sengül A. |
| Yayın Türü | Article |
| Tek Biçim Adres | https://hdl.handle.net/20.500.12628/5655 |
| Konu Başlıkları |
1,10-phenanthroline (phen)
2,2',2¨-terpyridine (terpy) 2,2'-bipyridine (bipy) Complexes with pyridine (py) Electronic spectra (UV-Vis, CD) Equilibrium constant with hydroxide Palladium(II) Platinum(II) |
| Koleksiyonlar |
Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed | SOBİAD Scopus İndeksli Yayınlar Koleksiyonu |
| Dergi Adı | Croatica Chemica Acta |
| Dergi Cilt Bilgisi | 74 |
| Dergi Sayısı | 3 |
| Sayfalar | 641 - 665 |
| Yayın Yılı | 2001 |
| Eser Adı [dc.title] | 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 |
| Yazar [dc.contributor.author] | Gameiro A.M.F. |
| Yazar [dc.contributor.author] | Gillard R.D. |
| Yazar [dc.contributor.author] | Rees N.H. |
| Yazar [dc.contributor.author] | Schulte J. |
| Yazar [dc.contributor.author] | Sengül A. |
| Yayın Yılı [dc.date.issued] | 2001 |
| Yayın Türü [dc.type] | article |
| Özet [dc.description.abstract] | Equilibrium constants are given for addition (mol ratio 1:1) of hydroxide to several palladium(II) and platinum(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 1H 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¨-terpyridine) 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. |
| Kayıt Giriş Tarihi [dc.date.accessioned] | 2019-12-23 |
| Açık Erişim Tarihi [dc.date.available] | 2019-12-23 |
| Yayın Dili [dc.language.iso] | eng |
| Konu Başlıkları [dc.subject] | 1,10-phenanthroline (phen) |
| Konu Başlıkları [dc.subject] | 2,2',2¨-terpyridine (terpy) |
| Konu Başlıkları [dc.subject] | 2,2'-bipyridine (bipy) |
| Konu Başlıkları [dc.subject] | Complexes with pyridine (py) |
| Konu Başlıkları [dc.subject] | Electronic spectra (UV-Vis, CD) |
| Konu Başlıkları [dc.subject] | Equilibrium constant with hydroxide |
| Konu Başlıkları [dc.subject] | Palladium(II) |
| Konu Başlıkları [dc.subject] | Platinum(II) |
| Haklar [dc.rights] | info:eu-repo/semantics/closedAccess |
| ISSN [dc.identifier.issn] | 0011-1643 |
| İlk Sayfa Sayısı [dc.identifier.startpage] | 641 |
| Son Sayfa Sayısı [dc.identifier.endpage] | 665 |
| Dergi Adı [dc.relation.journal] | Croatica Chemica Acta |
| Dergi Sayısı [dc.identifier.issue] | 3 |
| Dergi Cilt Bilgisi [dc.identifier.volume] | 74 |
| Tek Biçim Adres [dc.identifier.uri] | https://hdl.handle.net/20.500.12628/5655 |