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Diboranyl phosphonium cations: synthesis and chemical properties

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 str...

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Bibliographic Details
Main Authors: Litters, Sebastian (Author) , Ganschow, Michael (Author) , Kaifer, Elisabeth (Author) , Himmel, Hans-Jörg (Author)
Format: Article (Journal)
Language:English
Published: October 8, 2015
In: European journal of inorganic chemistry
Year: 2015, Issue: 31, Pages: 5188-5195
ISSN:1099-0682
DOI:10.1002/ejic.201500861
Online Access:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1002/ejic.201500861
Verlag, lizenzpflichtig, Volltext: https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/ejic.201500861
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Author Notes:Sebastian Litters, Michael Ganschow, Elisabeth Kaifer, and Hans-Jörg Himmel
Description
Summary: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.
Item Description:Gesehen am 26.06.2020
Physical Description:Online Resource
ISSN:1099-0682
DOI:10.1002/ejic.201500861

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