Synthesis and reactivity of platinum(II) cis-dialkyl, cis-alkyl chloro, and cis-alkyl hydrido bis-N-heterocyclic carbene chelate complexes

• Verfasst von: Brendel, Matthias [VerfasserIn]
• Verfasst von: Engelke, René [VerfasserIn]
• Verfasst von: Desai, Vidya [VerfasserIn]
• Verfasst von: Rominger, Frank [VerfasserIn]
• Verfasst von: Hofmann, Peter [VerfasserIn]
• Titel: Synthesis and reactivity of platinum(II) cis-dialkyl, cis-alkyl chloro, and cis-alkyl hydrido bis-N-heterocyclic carbene chelate complexes
• Verf.angabe: Matthias Brendel, René Engelke, Vidya G. Desai, Frank Rominger, and Peter Hofmann
• E-Jahr: 2015
• Jahr: May 20, 2015
• Umfang: 9 S.
• Fussnoten: Gesehen am 28.05.2020
• Titel Quelle: Enthalten in: Organometallics
• Ort Quelle: Washington, DC : ACS Publ., 1982
• Jahr Quelle: 2015
• Band/Heft Quelle: 34(2015), 12, Seite 2870-2878
• ISSN Quelle: 1520-6041
• DOI: doi:10.1021/acs.organomet.5b00204
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1698966202

Abstract

Platinum(II) cis-dimethyl and cis-dineopentyl complexes bearing the alkyl-substituted bis-NHC ligands Lt-Bu, LMe, and Li-Pr (Lt-Bu = 1,1′-di-tert-butyl-3,3′-methylenediimidazolin-2,2′-diylidene, LMe = 1,1′-dimethyl-3,3′-methylenediimidazolin-2,2′-diylidene, Li-Pr = 1,1′-diisopropyl-3,3′-methylenediimidazolin-2,2′-diylidene) as well as novel cis-alkyl chloro and cis-alkyl hydrido compounds were synthesized. The reactivity of the dimethyl complexes toward dichloromethane and methanol was investigated. Reductive elimination of alkanes from cis-alkyl hydrido complexes requires much higher temperatures than in related bisphosphine systems, which limits their applicability for the generation of reactive, bent platinum(0) d10-ML2 fragments for bond-activation chemistry. The platinum(II) complexes were characterized by NMR and IR spectroscopy, mass spectrometry, elemental analysis, and X-ray diffraction in most cases.