Group News

The long hydride battle is won

February 2023

Our ten-year-long battle with a really weird iron-hydride complex has finally come to fruition, with a paper appearing in Chemical Science. In order to sort out its dynamic behavior, Sean McWilliams performed neutron crystallography, lots of variable-temperature Mössbauer, and other studies, while our collaborators Eckhard Bill and Shengfa Ye contributed magnetic and computational analysis, respectively. And a huge amount of the insight into the crystal twinning that underlies the behavior came from Brandon Mercado, who we are so lucky to have here at Yale as a crystallographic collaborator.

A key driver behind our ultimate understanding was Eckhard, who tragically passed away just after the paper was submitted in the fall. This paper is a testament to his deep insight and fearless inquisitive spirit. We are really proud of this paper, which was recognized as a “Pick of the Week” by Chem. Sci.

Congraduations to Allie

January 2023

Congratulations to Allie Nagelski on the completion of her Ph.D.! Allie has done amazing research on carbon bridges in multi-iron compounds, which are models of the active site of nitrogenase. Along the way, she has contributed in countless ways to our group and to the department. Allie is moving on to postdoctoral work at Los Alamos National Lab, and we look forward to future achievements. Great job, Allie!

Alec's paper is out!

December 2022

Congratulations to Alec Hegg, whose first paper from the group has now appeared in Faraday Discussions. It describes our first foray into molybdenum chemistry, and he developed a porphyrin-supported molybdenum nitride that is capable of catalytically reducing N2 to ammonia. This is part of our ongoing collaboration with Alex Miller and Alan Goldman, where Alec is also playing an important leadership role on outreach (described at NitrogenFixers.org). Great stuff, Alec!

Welcome to Ryan and Teddy!

November 2022

We are pleased to welcome first-year students Ryan Donnelly and Teddy Girard to the Holland Group! Ryan comes to us from Holy Cross, and Teddy from Loyola University, and we’re excited to embark on new inorganic chemistry with Teddy and Ryan. Onward and upward!

Congraduations to Sam

October 2022

A hearty congratulations to Sam Bhutto, who completed his thesis this month. Sam has been our resident expert on C-N coupling and has contributed to the group culture and research in innumerable ways. We are super proud of Sam, and his positive attitude, knowledge, and hard work will continue to serve him well in his postdoctoral research with Louise Berben at UC Davis.

Welcome to Carmelita

September 2022

We’re excited to welcome Carmelita Ro-Mendez to the lab. Carmelita is a junior at Yale, and will be pushing back the frontiers of our work with SCS pincer ligated iron complexes. Looking forward to great work together, Carmelita!

Congraduations to Jeremy

August 2022

A huge congratulations to Jeremy Weber, who was an amazing group member for the past five years. Jeremy’s mentoring and team-minded spirit, as well as his deep thinking about nitrogen activation pathways, has been inspirational. Jeremy is moving on to a position at L3 Harris, and we look forward to his future successes. Great job, Jeremy!

Welcome to Chris

June 2022

We are excited to add to our team Chris Gendy, a new postdoctoral co-worker. Chris comes to us after Ph.D. work with Roland Roesler at Univ. Calgary, and postdoctoral work with Heikki Tuononen at Univ. Jyväskylä and Doug Stephan at Univ. Toronto. Chris is pursuing his interests in low-coordinate iron compounds in our lab, and we’re happy to have him as a coworker for the next months!

double congrats to Allie

June 2022

Congratulations to Allie Nagelski for two key accomplishments this past month! First, Allie was named Best Poster Presentation at the Fusion Conference on Small-Molecule Activation, for her poster on the synthesis and properties of diiron complexes relevant to nitrogenase. Second, after her similarly outstanding poster presentation at the Inorganic Chemistry Gordon Conference, she was elected Co-Chair of the Gordon Research Seminar for the next conference (2024). Great job, Allie!

paper on cobalt(IV) alkyls in JACS

June 2022

Congrats to Conner Wilson and DK Kim, whose paper on a salen-supported cobalt(IV) isopropyl complex has now appeared in J. Am. Chem. Soc. They generated this species at low temperature, and looked at its reactivity and spectroscopy (the latter in collaboration with Brian Hoffman’s group). These were interpreted through essential DFT calculations by Reagan Hooper (assisted by Rinaldo Poli). We learned that the complex has significant contribution from a resonance form that is cobalt(II)-(isopropyl cation), which explains its unusual Co-C bond energy, redox potential, reactivity, and catalytic relevance. Great job, all!

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