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Report SCF (HF/DFT) Convergence Issues
Questions

Dear Q-Chem Community, If you have any SCF (HF/DFT) jobs that are time-consuming or are facing convergence difficulties with Q-Chem, please send them to support@q-chem.com with the subject line “SCF Convergence Issue” t…

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What sort of SCF calculations are supported with external fields?
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How To
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How To
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Questions
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Questions
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Failure in Frequency job
Questions
3 212 April 24, 2026
Webinar 87: Improvements in the OO-DFT user interface
Webinars
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Facing convergence issue with CDFT geometry optimization
Questions
1 194 April 22, 2026
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Questions
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Questions
5 302 April 18, 2026
Energy inconsistency with PySCF / adcc
Questions
3 292 April 17, 2026
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Questions
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Questions
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Questions
4 264 April 10, 2026