A 2,2′-diphosphinotolane as a versatile precursor for the synthesis of P-ylidic mesoionic carbenes via reversible C-P bond formation

• Verfasst von: Wagner, Hannah [VerfasserIn]
• Verfasst von: Wadepohl, Hubert [VerfasserIn]
• Verfasst von: Ballmann, Joachim [VerfasserIn]
• Titel: A 2,2′-diphosphinotolane as a versatile precursor for the synthesis of P-ylidic mesoionic carbenes via reversible C-P bond formation
• Verf.angabe: Hannah K. Wagner, Hubert Wadepohl and Joachim Ballmann
• E-Jahr: 2021
• Jahr: 29 Jan 2021
• Umfang: 9 S.
• Fussnoten: Gesehen am 06.08.2021
• Titel Quelle: Enthalten in: Chemical science
• Ort Quelle: Cambridge : RSC, 2010
• Jahr Quelle: 2021
• Band/Heft Quelle: 12(2021), 10, Seite 3693-3701
• ISSN Quelle: 2041-6539
• DOI: doi:10.1039/D0SC06128J
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1755739710

Abstract

A metal-templated synthetic route to cyclic (aryl)(ylidic) mesoionic carbenes (CArY-MICs) featuring an endocyclic P-ylide is presented. This approach, which requires metal templates with two cis-positioned open coordination sites, is based on the controlled cyclisation of a P,P′-diisopropyl-substituted 2,2′-diphosphinotolane (1) and leads to chelate complexes coordinated by a phosphine donor and the CArY-MIC carbon atom. The C-P bond formation involved in the former partial cyclisation of 1 proceeds under mild conditions and was shown to be applicable all over the d-block. In the presence of a third fac-positioned open coordination site, the P-C bond formation was found to be reversible, as shown for a series of molybdenum complexes. DFT modelling studies are in line with an interpretation of the target compounds as CArY-MICs.