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Q-Chem 5.4.2 was released on December 20, 2021. Update or request your license today!

Q-Chem 5.4

Facilitating Worldwide Scientific Breakthroughs

Q-Chem is a comprehensive ab initio quantum chemistry software for accurate predictions of molecular structures, reactivities, and vibrational, electronic and NMR spectra. Find out about Q-Chem’s features or try Q-Chem for free.

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Just Announced! Webinar 60: Orbital Optimized Density Functional Theory for Electronic Excited States

Webinar 60 Representative Image

Q-Chem has announced our next webinar, "Orbital Optimized Density Functional Theory for Electronic Excited States," to be presented by Diptarka Hait of University of California at Berkeley at 10 a.m. PST, Thursday, January 27th.  For more information and to register, click here.

Q-Chem 5.4.2 Has Been Released!

Q-Chem 5.4 logo over a cube-shaped lattice structure

Q-Chem is pleased to announce the release of Q-Chem 5.4.2! This provides many improvements to our most recent release, including some new features. A comprehensive list of improvements, resolved issues, and updates can be found in the Q-Chem 5.4 release log.

Any of our customers who have purchased Q-Chem 5.4 can upgrade to 5.4.2 for free. Upgrade your copy of Q-Chem here!

If you do not have license for Q-Chem 5.4,… Read More

Announcing the Q-Chem December Holiday Sales Promotion

Dec Sale Q-Chem Banner-Square

Happy Holidays!  During our December holiday sales event, a 10% discount will be applied to all license orders and license upgrades placed by customers directly with Q-Chem before the end of December 2021.  (Please note:  This sale does not apply to reseller sales.)

Webinar 59: Restricted Active Space CI family of methods in Q-Chem

[Webinar 59 representative image]

Did you miss our latest webinar, "Restricted Active Space CI family of methods in Q-Chem," presented by Dr. David Casanova of Donostia International Physics Center (DICP) on November 24th?  The video of this presentation has now been uploaded to our website.  Check it out here.

Just Announced! Webinar 60: Orbital Optimized Density Functional Theory for Electronic Excited States

Webinar 60 Representative Image

Q-Chem has announced our next webinar, "Orbital Optimized Density Functional Theory for Electronic Excited States," to be presented by Diptarka Hait of University of California at Berkeley at 10 a… Read More

Q-Chem 5.4.2 Has Been Released!

Q-Chem 5.4 logo over a cube-shaped lattice structure

Q-Chem is pleased to announce the release of Q-Chem 5.4.2! This provides many improvements to our most recent release, including some new features. A comprehensive list of improvements, resolved… Read More

Announcing the Q-Chem December Holiday Sales Promotion

Dec Sale Q-Chem Banner-Square

Happy Holidays!  During our December holiday sales event, a 10% discount will be applied to all license orders and license upgrades placed by customers directly with Q-Chem before the end of… Read More

Webinar 59: Restricted Active Space CI family of methods in Q-Chem

[Webinar 59 representative image]

Did you miss our latest webinar, "Restricted Active Space CI family of methods in Q-Chem," presented by Dr. David Casanova of Donostia International Physics Center (DICP) on November 24th?  The… Read More

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