Non-Aqueous Neptunium(III) Halide Solvates

  • Author: Chemistry – A European Journal
  • Published Date: 29 November 2021
  • Copyright: Wiley-VCH GmbH
thumbnail image: Non-Aqueous Neptunium(III) Halide Solvates

Related Societies

The chemistry of transuranium elements is understudied compared with the rest of the periodic table due to their radioactivity and limited availability. However, it is important to study these elements, especially neptunium, because of their prominence in spent nuclear fuel. Although neptunium's aqueous chemistry has been developed to a certain degree, the non-aqueous chemistry of the element is still not well understood.


Suzanne C. Bart and colleagues, Purdue University, West Lafayette, IN, USA, have developed non-aqueous methods to synthesize an Np4+ starting material and two new Np3+ compounds. NpO2 was first converted to NpCl4(DME)2 (DME = dimethoxyethane) by first dissolving it in concentrated hydrochloric acid with added hydrofluoric acid. After drying to a residue and dissolving in anhydrous DME, SiMe3Cl was added to obtain the desired product. NpCl4(DME)2 was then reduced to the trivalent state using KC8 (pictured below), forming NpCl3(THF)x (THF = tetrahydrofuran). This intermediate was converted to NpI3(THF)4 and NpBr3(THF)4 through a halide exchange reaction.

 


All compounds were analyzed using 1H NMR, crystallography, and electronic absorption spectroscopy. In summary, three convenient synthetic routes to neptunium salts were reported, resulting in the compounds NpCl4(dme)2, NpI3(THF)4, and NpBr3(THF)4. These straightforward reaction pathways could help to advance the field of non-aqueous trivalent actinide chemistry.


 

 

Article Views: 1726

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