The holidays are almost upon us, and you know what that means: It's time for Q-Chem's annual sale! Get a 12% discount on all license orders and license upgrades placed directly with Q-Chem (not through resellers) before December 31, 2024. Don't miss out on this chance to save on a copy of our latest release! Contact us for a quote today!

Registration for the 2024 Q-Chem Developer Workshop is now open! The workshop will be happening virtually from December 16—19th, in half-day-long sessions. This free workshop is open to all Q-Chem developers regardless of experience, and will provide an introduction to developing in Q-Chem.

Check out the tentative schedule here! Topics will include introductory materials for beginners (proper use of … Read More

Q-Chem is pleased to introduce our latest release, Q-Chem 6.2.2. It includes several bugfixes and improvements to the recent 6.2 release, and an official version for Mac computers with Apple silicon is now available!

For a full list of updates, fixes, and resolved issues, please review the full 6.2 release log here. We also have a new release log that provides significantly more details on default and printing changes that may… Read More

Our latest Q-Chem webinar (Webinar 77), which was presented by Aniket Mandal on October 24, is now available! You can view the archived recording of the webinar here.

Time-dependent density functional theory (TD-DFT) within a restricted excitation space is used as an efficient and reasonably accurate means to compute core-level spectra, using only a small subset of the occupied orbitals in what is known as the core/valence separation approximation. TD-DFT… Read More