Q-Chem 4.3 Release Download
Last update 03/23/2016 (version 4.3.2)
View and download our standard form license agreement here.
Q-Chem 4.3 Package Installation
There are two ways to install Q-Chem 4.3: using universal online installer (recommended) or downloading the complete package for offline installation.
1. Download the universal installer (recommended) for online installation.
wget -N http://www.q-chem.com/download/qcinstall/qcinstall.sh
On Mac OSX if wget is not available on your system please use curl command below:
curl http://www.q-chem.com/download/qcinstall/qcinstall.sh > qcinstall.sh
chmod +x qcinstall.sh
2. Alternatively, download the standard distribution for offline installation by selecting a package below and untar it.
tar xvf qc43.tar
To install please run the installer qcinstall.sh and follow the onscreen instruction. A detailed installation guide and step-by-step tutorials are also provided to guide you through the installation process.
After a successful installation you need to wait to receive the license file by email, and save it as
a) to update the installed Q-Chem to the latest distribution, run
You may need to run qcupdate.sh twice, as the first time it may update the installer script.
[Online package maintenance utility qcupdate.sh is the new added feature in 4.2 release. To upgrade pre-4.2 Q-Chem installation please download and run standard installer qcinstall.sh. ]
b) to re-generate and sumit license data, run
c) to receive regular Updates you can use Linux cron utility and add the line below as the cron command. Please consult your system administrator for questions about using cron.
$QC/qcupdate.sh > $QC/qcupdate.log
Q-Chem 4.3 Package Distribution
Send us your feedback regarding website content, functionality or submit an enhancement request.