La Pierre Group

Our Chemical Science Pick of the Week for this week is "Direct measurement of covalent three-center, two-electron M–H–B bonding in Zr and Hf borohydrides using B K-edge XAS" by Jason Keith and Scott Daly et al.

Read it here: doi.org/10.1039/D5SC...

#ChemSciPicks

From @acboggiano.bsky.social, @f-orbitals.bsky.social, and co-workers, the first crystal structures of Pr(v) complexes.

The 5+ state was achieved through oxidation of the tetravalent imidophosphorane complex.

🔗CSD Entry TUNXOT: ccdc-info.com/4je9YdB

#FeaturedStructureFriday
@natchem.nature.com

Praseodymium powers up to +5 Isolating the lanthanide in this oxidation state suggests a shift in some periodic tables

Pushing the known limits of lanthanide oxidation, chemists have isolated praseodymium (Pr) in the +5 oxidation state. The finding suggests that chemists should shift how they situate lanthanides in the periodic table. cen.acs.org/materials/in... #chemsky🧪

Praseodymium powers up to +5 Isolating the lanthanide in this oxidation state suggests a shift in some periodic tables

Good thing that I work in print media, because I reallys struggle to pronounce praseodymium. My latest piece in @cenmag.bsky.social about a Pr5+ compound from @stormslapierre.bsky.social @bessvlai.bsky.social and Ivan A. Popov.
cen.acs.org/materials/in...

This project was driven experimentally by @acboggiano.bsky.social and @julieniklas.bsky.social with critical crystallographic insight from Florian Kleemiss and theoretical analyses by @bessvlai.bsky.social, Ivan Popov, Chad Studvick, and Sabyasachi Roy Chowdhury

Praseodymium in the formal +5 oxidation state Nature Chemistry - The most common oxidation state for lanthanide elements is +3, and, beyond cerium, examples of these elements exhibiting higher oxidation states remain scarce. Now, a molecular...

We are excited to share praseodymium 5+! Finally in print!
A new PR for Pr!

rdcu.be/egHf6

U4+/5+/6+ in a Conserved Pseudotetrahedral Imidophosphorane Coordination Sphere While several ligand systems support uranium across a range of oxidation states, spanning more than two oxidation states in a conserved coordination geometry is uncommon among structurally authenticated complexes. Imidophosphorane ligands significantly stabilize high-valent lanthanide and actinide complexes. Here, we report a series of homoleptic uranium imidophosphorane complexes, spanning the +4, +5 and +6 oxidation states in a four-coordinate pseudotetrahedral ligand field. The +6 oxidation state is accessible using a mild ferrocenium oxidant, yielding a rare example of U6+ in a pseudotetrahedral coordination environment. As the formal oxidation state increases, the U–N distances gradually contract, consistent with the Shannon ionic radii of U4+/5+/6+. Compared to reported complexes, the short U–N distances observed in the U6+ complex are more comparable to dianionic imido ligands than monoanionic amido ligands.

My new study featuring a series of uranium in the +4/+5/+6 oxidation states.

I've been very intrigued by the prospect of isolating this unusual tetrahomoleptic U6+ di BArF salt for some time, and am happy to share it in IC! s/o to my co authors!

chemsky⚗️

pubs.acs.org/doi/10.1021/...

Travel to Atlanta, food, and housing are covered! This is a great opportunity to learn about the DOE National Labs and graduate research opportunities! Sophomore, Junior, and Senior undergraduates are eligible!

Considering graduate research with actinides, or a career in the National Laboratories? Join us for the DOE/NNSA Graduate Studies Workshop!
-Lectures from National Lab Researchers
-networking, grad school Q&As, lab tours, and more
- Apply by Feb.15th: trucorechemistry.com/apply