Cooperative Yet Divergent Reactivity of Magnesium and Calcium Hydridostannylene Derivatives

18 October 2024, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Reactions of a m-terphenylhydridostannylene with -diketiminato magnesium and calcium hydrides provide bis-2-hydrido species, the heterobimetallic constitutions of which are maintained after the addition of THF donor solvent. In both cases, reactions with hex-1-ene result in the formation of tetravalent organostannyl alkaline earth derivatives. Whereas the magnesium reagent undergoes facile twofold addition, the calcium-centered process is arrested after a single alkene reduction event. This contrasting behavior is assessed to result from the heavier alkaline earth element’s ability to form a persistent polyhapto interaction with an arene substituent of the m-terphenyl ligand.

Keywords

magnesium
calcium
tin
hydride
hydrometallation

Supplementary materials

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Supporting Information
Description
Full experimental and instrumental details, NMR, spectra data, details of the X-ray analysis and the methods employed in the quantum chemical investigations of this chemistry are available in the Supporting Information to this article. Crystallographic data for all compounds have been deposited with the Cambridge Crystallographic Data Centre as supplementary publications CCDC 2385273 - 2385278
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