Reactions of a diborylstannylene with CO2and N2O: diboration of carbon dioxide by a main group bis(boryl) complex

Andrey V. Protchenko, M. Fuentes, Jamie Hicks, Caitilín McManus, Rémi Tirfoin, Simon Aldridge*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The reactions of the boryl-substituted stannylene Sn{B(NDippCH)2}2(1) with carbon dioxide have been investigated and shown to proceedviapathways involving insertion into the Sn-B bond(s). In the first instance this leads to formation of the (boryl)tin(ii) borylcarboxylate complex Sn{B(NDippCH)2}{O2CB(NDippCH)2} (2), which has been structurally characterized and shown to feature a κ2mode of coordination of the [(HCDippN)2BCO2]ligand at the metal centre.2undergoes B-O reductive elimination in hexane solution (in the absence of further CO2) to give the boryl(borylcarboxylate)ester {(HCDippN)2B}O2C{B(NDippCH)2} (3)i.e.the product of formal diboration of carbon dioxide. Alternatively,2can assimilate a second equivalent of CO2to give the homoleptic bis(borylcarboxylate) Sn{O2CB(NDippCH)2}2(4), which can be preparedviaan alternative route from SnBr2and the potassium salt of [(HCDippN)2BCO2], and structurally characterized as its DMAP (N,N-dimethylaminopyridine) adduct. Structural and reactivity studies also point to the possibility for extrusion of CO from the [(HCDippN)2BCO2]fragment to generate the boryloxy system [(HCDippN)2BO], a ligand which can be generated directly from1viareaction with N2O.

Original languageEnglish
Pages (from-to)9059-9067
Number of pages9
JournalDalton Transactions
Volume50
Issue number26
DOIs
Publication statusPublished - 14 Jul 2021
Externally publishedYes

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