Diboranyl phosphonium cations

• Verfasst von: Litters, Sebastian [VerfasserIn]
• Verfasst von: Ganschow, Michael [VerfasserIn]
• Verfasst von: Kaifer, Elisabeth [VerfasserIn]
• Verfasst von: Himmel, Hans-Jörg [VerfasserIn]
• Titel: Diboranyl phosphonium cations
• Titelzusatz: synthesis and chemical properties
• Verf.angabe: Sebastian Litters, Michael Ganschow, Elisabeth Kaifer, and Hans-Jörg Himmel
• E-Jahr: 2015
• Jahr: October 8, 2015
• Umfang: 8 S.
• Fussnoten: Gesehen am 26.06.2020
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2015
• Band/Heft Quelle: (2015), 31, Seite 5188-5195
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.201500861
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Boranes
• Sach-SW: Boron
• Sach-SW: Cations
• Sach-SW: Density functional calculations
• Sach-SW: Phosphorus
• K10plus-PPN: 170266399X

Abstract

Abstract Hydride abstraction from the diborane [HB(hpp)]2 (hpp = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidinate) followed by base stabilization led to the first (highly water sensitive) diboranyl phosphonium cations of the general formulas [HB(hpp)2BPR3]+ and [HB(hpp)2BPHR2]+. The B?P bond strength could be varied over a relatively large range by choice of the substituents R on the phosphine. The cation [HB(hpp)2BPCy3]+ (Cy = cyclohexyl) was structurally characterized. The PCy3 base of this cation could be substituted by a stronger base (a carbene or a bicyclic guanidine). In solution, [HB(hpp)2BPCy3]+ very slowly decomposes, and [HB(hpp)3BH]+ was identified as one of the decomposition products.