Roland Roesler

The group will soon be advertising a 3-year PDRA position @imperialchemistry.bsky.social. The successful candidate will research the synthesis and reactivity of complexes with alkaline earth-metal bonds. Start date: 03/26. Please get in touch for infomal inquries.

[Theoretically] Brewing Co. Lethbridge, Alberta's only nano-brewery. Sourcing local ingredients, brewed and cared for by local hands, to produce our tasty European-inspired ales.

True story @aspuru.bsky.social
www.theorybrew.ca

2025 Organic Reaction Championship - ACS Division of Organic Chemistry

Round of 16 ends tonight! Key match up - Grignard vs. Diels-Alder!
Vote NOW in the 2025 Organic Reaction Championship!

zurl.co/X72Wz

University of Lethbridge: Chemistry Instructor (Rank III) https://chempostingscanada.blogspot.com/2025/12/university-of-lethbridge-chemistry.html

Good luck!

Diaryl Bismuthides and Acyl Bismuthanes Enable Visible-Light-Induced Reversible Carbon Monoxide Insertion and Extrusion - Nature Communications Carbon monoxide (CO) is one of the simplest and most fundamental molecules that has fascinated chemists for decades. Early-on, chemists have recognized and exploited its favorable properties as a key ...

Nucleophilic #Bismuth: diarylbismuth-anions grant access to bismuth-acyl compounds & visible-light-induced reversible insertion/extrusion of CO! Just out @natcomms.nature.com: link.springer.com/article/10.1.... Congrats to the team (including @felixgeist.bsky.social, @jordipoater.bsky.social)!

Just use a pressure vessel - autoclave.

Our latest is out now in @angewandtechemie.bsky.social!
Thermochromism, C-H/O activation & redox chem at a planar Bi triamide. Congrats to PhD Will Howlett on leading this @bsky.app initiated collab with @chrisslootweg.bsky.social + @jasonmasuda.bsky.social
@dalchemistry.bsky.social.

bit.ly/480io3T

Assistant Professor, Electrochemistry for Energy Conversion/Storage, Faculty of Science in Calgary, AB, Canada | Roland Roesler The Department of Chemistry at the University of Calgary is advertising an Assistant Professor position in the area of Electrochemistry for Energy Conversion and Storage. Deadline to apply January 9, ...

www.linkedin.com/posts/roland...

Assistant Professor, Computational Chemistry for Energy Materials, Faculty of Science in Calgary, AB, Canada | Roland Roesler The Department of Chemistry at the University of Calgary is advertising an Assistant Professor position in the area of Computational Chemistry for Energy Materials. Deadline to apply January 9, 2026. ...

www.linkedin.com/posts/roland...

I remember 2 pages including references for most communications. But what difference does this make if the supporting info is 100 pages!?

Electrostatic Fields Induce Accelerated Proton Coupled Electron Transfer Rates in Chlorophyll Model Compounds Chlorophyll-based pigments are crucial mediators of redox processes in photosynthesis, serving as the primary electron donors in photosystems I and II. Despite their structural similarities, these pigments exhibit a wide range of redox potentials (0.5–1.3 V vs SHE), and little experimental insight into the origins of this variation is available. To address this deficit, we have synthesized two crown ether-appended Mg-porphyrin complexes as chlorophyll model compounds and demonstrated their ability to bind redox-inactive metal cations. Cation binding to the Mg-porphyrin complexes was found to increase their redox potentials in a manner that depends linearly on the total cationic charge felt by the complex, implicating a through-space electrostatic field effect. The corresponding 1-electron oxidized π-cation radical complexes were then prepared and characterized by UV–vis, FT-IR, and EPR spectroscopies and ESI-MS. The π-cation radical species were found to be competent for the PCET oxidation of a phenolic substrate, mimicking the reaction between photo-oxidized chlorophyll and tyrosine in photosystem II. Cation binding to the π-cation radical complexes was found to increase the rates of their PCET and ET reactions in a charge-dependent manner which could be rationalized using Marcus theory. This work provides direct experimental evidence that electrostatic fields can tune the redox potentials of chlorophyll model compounds, leading to an increase in their oxidative reactivity.

Check out our latest contribution in @jacs.acspublications.org, moved forward by Oscar Kelly

doi.org/10.1021/jacs...

With Brendan Twamley and @fenicu.bsky.social

Cc @iqccudg.bsky.social

What is the difference between chemical equivalence and magnetic equivalence? u-of-o-nmr-facility.blogspot.com/2008/08/chem... #nmr #nmrchat #chemsky

Trump administration targets academic journals with attorney letter, proposed funding cuts Budget plan would kill two CDC journals, while U.S. prosecutor accuses some nongovernmental publications of being “partisans”

A new budget plan would kill two CDC journals, while a U.S. prosecutor accuses some nongovernmental publications of being “partisans.”

Geometrically Constrained Bismuth Compounds A major thrust of research in modern main group chemistry is the use of multidentate ligands to perturb geometries at p-block elements such that they deviate substantially from valence shell electron-...

Pleased to share our chapter in @springernature.com book Structure & Bonding on "Geometrically Constrained Bismuth Compounds". Co-written with recent MSc Tamina @taminazk.bsky.social. Many thanks to reviewers + ed. Crispin Lichtenberg!
link.springer.com/chapter/10.1...
@dalchemistry.bsky.social

Harvard steps up

www.harvard.edu/research-fun...

Synthesis of a Transient Cationic Phosphaborene and its Trapping by Facile Aliphatic C−H Bond Activation Abstraction of bromide from a B-brominated phosphaborene stabilized by a cyclic alkylamino carbene results in the formation of a transient cationic phosphaborene, which undergoes intramolecular C−H a....

Senior @ucalgary.bsky.social undergrad Anika Kehrig’s summer research with Heikki Tuononen @uniofjyvaskyla.bsky.social, supported by @mitacscanada.bsky.social, is reported in @chemistryeurope.bsky.social: A collaboration with @wpiers.bsky.social alumnus Etienne LaPierre.
doi.org/10.1002/chem...

Conjugated-Length-Dependent Self-Assembly, Host–Guest Binding, and Photoreactivity of Thienoacene Ribbons

doi.org/10.31635/ccs...

Dr. Mark MacLachlan

Dr. Mark MachLachlan has been appointed as Dean of the Faculty of Science for a five-year term, commencing April 1, 2025.

academic.ubc.ca/academic-com...

Modern NMR Crystallography: Concepts and Applications NMR crystallography has blossomed as a focussed field of research in recent years and is now acknowledged as such by the International Union of Crystallogr

Book on NMR Crystallography is finally out today!

"Modern NMR Crystallography: Concepts and Applications"

#NMRchat
@uottawascience.bsky.social

@rsc.org

doi.org/10.1039/9781...

Thanks to all authors for their hard work and patience!

Dicationic Boron Derivatives of Schlenk’s and Thiele’s Hydrocarbon In recent years, neutral NHC-stabilized boryl radicals have been investigated as reactive species in various organic transformations. However, cationic boron radicals have been significantly less explored. In addition, boron-centered open-shell species with S > 1/2 have emerged as attractive synthetic targets. In this study, we provide a synthetic route to an NHC-stabilized boryl radical cation as a salt of the weakly coordinating [Al(ORF)4]− (RF = C(CF3)3) anion. The synthetic procedure was extended to dicationic diboron derivatives of Schlenk’s and Thiele’s hydrocarbons with meta- and para-phenylene coupling units between the spin centers. While most known isolable boron biradicals have a singlet ground-state with a thermally accessible triplet state, the boron version of Schlenk’s hydrocarbon occupies a ground-state triplet spin-state, as shown by combined electron paramagnetic resonance spectroscopy and density functional theory studies. Furthermore, initial reactivity studies of the dications with elemental sulfur and diphenyldiselenide are presented.

Dicationic Boron Derivatives of Schlenk’s and Thiele’s Hydrocarbon | Journal of the American Chemical Society @jacs.acspublications.org @pubs.acs.org

pubs.acs.org/doi/full/10....

Senior @ucalgary.bsky.social undergrad George Doerksen’s summer research at @helsinki.fi - supported by @mitacscanada.bsky.social and conducted with Petra Vasko and Timo Repo - is reported in @chemcomm.rsc.org.
pubs.rsc.org/en/content/a...

"Chemistry Between the Stars" with @kavliprize.bsky.social laureate Ewine van Dishoeck, the 2025 ICI lecturer @ucpress.bsky.social

Synthesis of triple-decker sandwich compounds featuring a M–M bond through cyclo-Bi5 and cyclo-Sb5 rings - Nature Chemistry Although several inorganic analogues of cyclopentadiene have been reported with group-15 elements, examples featuring the heavier elements Sb and Bi remain scarce. Now, a Bi5 ring has been stabilized ...

The comeback of the complexes with "naked" group 15 ligands continues with some triple-decker heavyweights.
www.nature.com/articles/s41...

Seabirds in crisis: Plastic ingestion induces proteomic signatures of multiorgan failure and neurodegeneration Plastic consumption in seabirds causes blood signatures of widespread organ damage including brain, stomach, kidney, and liver.

Ingesting high levels of plastics can harm baby seabirds in unseen ways, affecting their blood, brains, and other organs, according to a new #ScienceAdvances study. scim.ag/4bJza91

Carbene-activated stannylenes to access selective C(sp3)–H bond scission at the steric limit - Nature Communications The ubiquity of N-heterocyclic carbenes (NHCs) in chemical research typically arises from their potent stabilizing capabilities and role as innocent spectators to stabilize otherwise non-bottleable co...

Thrilled to share our latest work from the lab, in collaboration with @townrowresearch.bsky.social , exploring the fusion of heteroleptic amido-substituted stannylenes and NHCs! #chemsky www.nature.com/articles/s41... 1/2

Come be our colleague! The University of Prince Edward Island is hiring a tenure track assistant professor in cleantech!
@chemjobber.bsky.social

www.upei.ca/hr/competiti...

Excited-state configuration of nitroarenes enables oxidative cleavage of aromatics over alkenes The ozonolytic deconstruction of aromatics remains a challenge in organic chemistry. Ozone preferentially reacts with alkenes over arenes, meaning that once the initial aromatic cleavage occurs, the d...

To get around the jargon, imagine a knife that would cut through an apple but not a peeled banana🔪🍎🍌

In @science.org this week the Leonori and Ruffoni groups show photoexcitation of nitroarene reagents selectively cleaves aryl C=C bonds over olefins

chemsky 🧪

www.science.org/doi/10.1126/...

Ayu’s work on CN/NC-isomerism in Dioxophosphoranes is just out in Chem.Sci. Here we show that Cyanophosphides can be cleanly oxidized with O2, giving [ArPO2(CN)]-. Surprisingly both, cyanide and isocyanide form simultaneously! Super exited about this! @likat.bsky.social

pubs.rsc.org/en/content/a...

Is it a covalent bond? Is it a Lewis-pair? See my latest article with the Krossing group about the synthesis and characterization of the first heterodinuclear metal carbonyl cation [MnFe(CO)10]+ published in Chem. Eur. J. @chemistryeurope.bsky.social doi.org/10.1002/chem... @uni-freiburg.de