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A Lead(II) Substituted Triplet Carbene

26 July 2024, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Reaction of the pincer-type ligand L3 supported complex [L3PbBr][BArF24] (1) with Li[(C(=N2)TMS)] furnishes [L3Pb(C(=N2)TMS)][BArF24] (2). Diazo-compound 2 eliminates dinitrogen upon irradiation affording formal plumba-alkyne 3, which persists in cold fluoroarene solutions. Variable temperature UV/Vis and NMR spectroscopies in combination with quantum-chemical calculations identify 3 as a metal-substituted triplet carbene. In-crystallo irradiation of [L3Pb(C(=N2)TMS)(tol)][BArF24] (2∙tol) provides a snapshot of intermolecular C–H bond insertion with toluene (4).

Keywords

Triplet Carbene
Metalla-Alkyne
Main Group
Multiple Bonds
CH Activation

Supplementary materials

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Description
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Version History

Jul 26, 2024 Version 1

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The content is available under CC BY NC ND 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2024-64knm
D O I: 10.26434/chemrxiv-2024-64knm [opens in a new tab]

Funding

European Research Council
948185
Deutsche Forschungsgemeinschaft
INST 256/506-1
Deutsche Forschungsgemeinschaft
INST 256/582-1

Author’s competing interest statement

The author(s) have declared they have no conflict of interest with regard to this content

Ethics

The author(s) have declared ethics committee/IRB approval is not relevant to this content

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