Webinar 87: Improvements in the OO-DFT User Interface

Join us on April 23rd at 11AM PDT for a talk from Juan E. Arias Martinez on his recent work creating a new OO-DFT interface in Q-Chem! The new driver offers an easy-to-use, streamlined interface, and includes many crucial analysis tools. He will also discuss how he has used this new interface to study organic donor-acceptor charge-transfer excitations. … Read More

Q-Chem Newsletter: April 7, 2026

Webinar Recording Available: CC-in-DFT Embedding

Did you miss the recent talk from Anthuan Ferino Pérez on CC-in-DFT embedding? If so, not to worry! The recording is now available on our YouTube channel… Read More

Q-Chem Newsletter: February 16, 2026

2026 Virtual Winter School on Computational Chemistry: Recordings Available!

Q-Chem was pleased to be one of the sponsors of the 2026 Virtual Winter School on Computational Chemistry! We also hosted not one but two Q-Chem workshops, with talks and hands-on exercises led by experts from the Q-Chem board and team.

You can view the recordings and exercises from the workshop here. ⧉ Thank you to the… Read More

Q-Chem Newsletter: January 26, 2026

Q-Chem News & Events

Virtual Winter School on Computational Chemistry

Q-Chem is thrilled to be one of the sponsors for the 2026 Virtual Winter School on Computational Chemistry… Read More

Call for Nominations: 2026 Nick Besley Award

We are now accepting nomination submissions for the 2026 Nick Besley Award. This award recognizes excellence in the development or application of new methods for computational spectroscopy in the Q-Chem open-teamware community project. The award, which is given annually, includes a certificate and a $500 prize. It commemorates the contributions of Prof. Nick Besley, who is remembered for his multi-faceted contributions to excited-state theory and methodology, with particular emphasis on the… Read More

Happy New Year: Q-Chem Year In Review (2025)

Q-Chem 6.4 is Now Available!

Q-Chem is pleased to announce the release of Q-Chem 6.4! Upgrade for new spectroscopy features (such as CVS-XCIS our new-and-improved ΔSCF driver), a new iterative CC-in-DFT embedding approach, two-step Cholesky decomposition for faster CC calculations, mixed-reference SF-DFT (MR-SF-DFT), stochastic RI-CC2, over fifteen new DFT methods, and more!

For a full list of new features and bugfixes, please review the official Q… Read More

Webinar 83: Coupled Cluster Developments in Q-Chem

Our latest webinar is now available for viewing! The webinar was presented on November 18 by Manisha, one of our Summer at Q-Chem interns. During the webinar, she discussed her recent exciting work with coupled cluster triples. The webinar recording is now available for viewing here!

Webinar 82: Constrained CASSCF and Tight-Binding Calculations in Q-Chem

Q-Chem is pleased to announce that our most recent webinar is now available for viewing! This webinar was presented by Xinchun Wu, one of our 2025 Summer at Q-Chem interns, on October 3, 2025. She presented on her recent work implementing constrained CASSCF and tight-binding calculations in Q-Chem. The webinar recording is available for viewing here.

Q-Chem 6.3.1 Is Now Available!

Q-Chem is pleased to introduce our latest release, Q-Chem 6.3.1. It includes several bugfixes and improvements to the recent 6.3 release! For a full list of updates, fixes, and resolved issues, please review the full 6.3 release log here.

Any of our customers who have purchased Q-Chem 6.3 already can upgrade to Q-Chem 6.3.1 for free! Don't forget that Q-Chem is also now available on… Read More