Benzodiphosphaborolediide Synthesized

  • Author: Chemistry – A European Journal
  • Published Date: 21 October 2021
  • Copyright: Wiley-VCH GmbH
thumbnail image: Benzodiphosphaborolediide Synthesized

Related Societies

Aromatic, carbon-rich anions such as cyclopentadienyl can stabilize metal ions and allow the control of their electronic, magnetic, and chemical behavior. Analogues that contain phosphorus, nitrogen, or boron have similar uses, particularly for metals in lower oxidation states. Combining these elements in the same heterocycle is, thus, desirable. Boron/nitrogen analogues (azaborolides) have been studied, but boron/phosphorus analogues (phosphaborolides) had remained hypothetical so far.


Ian R. Crossley, University of Sussex, Brighton, UK, and colleagues have synthesized the first example of a diphosphaborolediide ion (pictured), which was isolated as its lithium salt. A one-pot sequential lithiation of bis(phosphino)benzene, quenched with PhBCl2 (pictured below), gave the benzodiphosphaborolediide salt in 50 % isolated yield. The dilithio salt could be obtained as either an oligomeric tetrahydrofuran (THF) solvate or a discrete tetramethylethylenediamine (TMEDA) adduct, both of which were characterized using X-ray diffraction.

 

Density functional theory (DFT) calculations confirmed the aromaticity of the diphosphaborolediide. It can coordinate as a π-ligand to zero-valent molybdenum, while also serving as a bridging σ-ligand through its phosphorus lone pairs. Benzodiphosphaborolediides could, thus, be versatile additions to the "hetero-cyclopentadienyl" ligand family.


 

 

Article Views: 1842

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH