Synthesis and properties of 2- or 2,5-substituted thiophene and 2- or 2,5′-substituted dithiophene derivatives of platinum
| Autor: | Kenkichi Sonogashira, Kyo Shiina, Sonae Kotani |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Bicyclic molecule
Absorption spectroscopy Ligand Stereochemistry Organic Chemistry chemistry.chemical_element Biochemistry Medicinal chemistry Inorganic Chemistry Metal chemistry.chemical_compound chemistry visual_art Materials Chemistry Thiophene visual_art.visual_art_medium Tributylphosphine Physical and Theoretical Chemistry Platinum |
| Zdroj: | Journal of Organometallic Chemistry. 429:403-413 |
| ISSN: | 0022-328X |
| DOI: | 10.1016/0022-328x(92)83188-n |
| Popis: | The reaction of [PtCl 2 (COD)] (COD = cycloocta-1,5-diene) with 2,5-bis(trimethylstannyl)thiophene or with 2,5′-bis(trimethylstannyl)-5-(2′-thienyl)thiophene gives diplatinum complexes bridged with 2,5-thienylene or 2,5′-di(5,2′-thienylene), [Cl(COD)Pt(μ-2,5-C 4 H 2 S)Pt(COD)Cl] ( 1 ) and [Cl(COD)Pt(μ-2,5′-C 4 H 2 S-C 4 H 2 S)Pt(COD)Cl] ( 4 ). On treatment with tri-n-butylphosphine these give the corresponding tributylphosphine derivatives, trans,trans -[Cl(PBu 3 ) 2 Pt(μ-2,5-C 4 H 2 S)Pt(PBu 3 ) 2 Cl] ( 2 ) and trans,trans -[Cl(PBu 3 ) 2 Pt(μ-2,5′-C 4 H 2 S-C 4 H 2 S)Pt(PBu 3 ) 2 Cl] ( 5 ), respectively. Treatment of 2 with 2-thienyllithium in THF gives trans,trans -[(2-C 4 H 3 S)PBu 3 ) 2 Pt(μ-2,5-C 4 H 2 S)Pt(PBu 3 ) 2 (2-C 4 H 3 S)] ( 3 ). The di-2-thienyl and bis-2-dithienyl complexes, [M(2-C 4 H 3 S) 2 (PBu 3 ) 2 ] ( 6 ) and [M{5-(2′-C 4 H 3 S)-2-C 4 H 2 S} 2 (PBu 3 ) 2 ] {M = Pt ( 7a ), Pd ( 7b ), Ni ( 7c )}, have also been prepared by treatment of [M(PBu 3 ) 2 X 2 ] (X Cl or Br) with 2-thienyllithium and 5-(2′-thienyl)-2-thienyllithium in THF. The electronic spectra of the above complexes contain metal to ligand charge transfer bands, suggesting that d π − p π interaction between two platinum atoms through thienylene groups appears to play an important role. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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