Cationic olefin complexes of platinum(II): Aspects of availability and reactivity
| Autor: | Sara de Pinto, Francesco Paolo Fanizzi, Michele Benedetti, Carmen R. Barone, Giovanni Natile, Federica De Castro |
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| Přispěvatelé: | Benedetti, Michele, Barone, Carmen R., De Pinto, Sara, DE CASTRO, Federica, Natile, Giovanni, Fanizzi, Francesco Paolo |
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Olefin fiber 010405 organic chemistry Stereochemistry Phenanthroline Disproportionation 010402 general chemistry 01 natural sciences Medicinal chemistry 0104 chemical sciences Coordination complex Inorganic Chemistry chemistry.chemical_compound Deprotonation chemistry Materials Chemistry Reactivity (chemistry) Physical and Theoretical Chemistry Acetonitrile Platinum Coordination chemistry Organometallic chemistry Square planar complex Olefin deprotonation Allylic complex Ligand substitution Organometallic chemistry |
| Zdroj: | Inorganica Chimica Acta. 470:172-180 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2017.04.015 |
| Popis: | The series of complexes of formula [PtCl(η 2 -olefin)( N^N )] + , previously investigated for N^N = N , N , N′ , N′ -tetramethyl-ethylenediamine (Me 4 en), has been extended to the case of aromatic diimines 1,10-phenanthroline (phen) and 3,4,7,8-tetramethyl-1,10-phenanthroline (Me 4 phen) and to a variety of olefins (ethene, propene and styrene). The complexes have been prepared by reaction of the [PtCl 3 (η 2 -olefin)] − anions (K[PtCl 3 (η 2 -styrene)] reported here for the first time) with N^N in basic methanol. The initial [PtCl{η 1 -CH 2 CH(R′) OMe}( N^N )] (R′ = Me, Ph) complexes are formed in quantitative yield and as pure Markovnikov isomer. The reaction of the alkoxylic species with non coordinating acids, results in the quantitative formation of the desired cationic π-olefin complexes [PtCl(η 2 -olefin)( N^N )] + . The phenanthroline ligand confers peculiar properties to the new compounds. In particular, by reaction with triethylamine, [PtCl{η 2 -CH 2 CH(Me)}( N^N )] + species, undergo deprotonation of the olefin and formation of the dimeric species [{PtCl( N^N )} 2 ( μ -η 1 :η 2 -CH 2 CH CH 2 )] + which could be isolated and characterized. Interestingly such product in acetonitrile gives a disproportionation with precipitation of [PtCl 2 (phen)] and formation in solution of the new η 3 -allyl complex [Pt(η 3 -C 3 H 5 )(phen)]ClO 4 . |
| Databáze: | OpenAIRE |
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