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Synthesis and structure of an acyclic dialkylstannylene

Lookup NU author(s): Dr Keith IzodORCiD, Dr Corinne Wills, Professor Mike ProbertORCiD, Dr Ross Harrington

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Abstract

The reaction between iPr₂PCl and one equivalent of MeMgBr, followed by one equivalent of BH₃·SMe₂ gives the phosphine-borane iPr₂P(BH₃)Me (4). Treatment of 4 with nBuLi, followed by Me₃SiCl gives the sterically demanding phosphine-borane {iPr₂P(BH₃)}(Me₃Si)CH₂ (5) in good yield. Metalation of 5 with nBuLi yields {iPr₂P(BH₃)}(Me₃Si)CHLi (6), which was crystallised as the TMEDA adduct [{iPr₂P(BH₃)}(Me₃Si)CH]Li(TMEDA) (6a) and characterised by X-ray crystallography. The reaction between two equivalents of in situ-generated 6 and Cp₂Sn in toluene gives the dialkylstannylene [{iPr₂P(BH₃)}(Me₃Si)CH]₂Sn (7), which was crystallised from methylcyclohexane/THF as the rac diastereomer. X-ray crystallography reveals that stabilisation of the Sn centre in 7 is afforded by two agostic-type B-H..Sn interactions, one from each BH₃ group.

Publication metadata

Author(s): Izod K, Wills C, Probert MR, Harrington RW

Publication type: Article

Publication status: Published

Journal: Main Group Metal Chemistry

Year: 2014

Volume: 37

Issue: 5-6

Pages: 113-117

Print publication date: 01/12/2014

Online publication date: 26/09/2014

Acceptance date: 20/08/2014

Date deposited: 31/10/2014

ISSN (print): 0792-1241

ISSN (electronic): 2191-0219

Publisher: De Gruyter

URL: http://dx.doi.org/10.1515/mgmc-2014-0028

DOI: 10.1515/mgmc-2014-0028

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