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Cannot get rid of Imaginary Frequency
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3
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351
|
November 25, 2025
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TDA with RSH giving negative triplet excitation
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11
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429
|
November 24, 2025
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“ADC(3) singlet and triplet excited states with PCM – input and disk quota issues”
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3
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421
|
November 21, 2025
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Second Derivative for DC-DFT
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9
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494
|
November 21, 2025
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TD-DFT geometry optimization using IEFPCM solvation model
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1
|
196
|
November 20, 2025
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|
Webinar 83: Coupled Cluster Developments in Q-Chem
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0
|
167
|
November 20, 2025
|
|
Obtaining cube file for mo's, suggesting bond breaking
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2
|
180
|
November 19, 2025
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Issue with S₁ State Optimization Under PCM – SCF Convergence Error
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3
|
232
|
November 18, 2025
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How to set broken‑symmetry state?
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7
|
269
|
November 17, 2025
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Problem oxygen potential energy scan using CCSD(T) and EA state PES using EA-EOM-CCSD
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11
|
727
|
November 11, 2025
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“double free or corruption (out)” error in TDDFT + EFP job with large number of fragments
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1
|
220
|
November 9, 2025
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Cannot escape an imaginary frequency
|
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1
|
261
|
November 7, 2025
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Limited support for analytic Hessians in Q-Chem
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10
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1037
|
November 6, 2025
|
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How does IQmol calculate the center of mass of a molecule?
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1
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248
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November 1, 2025
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TSVDW and MBD crashes
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1
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221
|
October 30, 2025
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Unexpected behaviour: core orbitals are not frozen during MP2/MP3 step in ADC calculations
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4
|
429
|
October 27, 2025
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SCF convergence issue with diffuse functions on basis set
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27
|
1077
|
October 22, 2025
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Crash upon frequency calculations with range separated bybrid
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1
|
328
|
October 21, 2025
|
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Cryptic import_xcfunc warning
|
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10
|
500
|
October 20, 2025
|
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What sort of RI techniques are safe to use with different types of SCF?
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3
|
373
|
October 16, 2025
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RI worsens SCF timings
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4
|
493
|
October 16, 2025
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EOMCCSDT calculations
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2
|
415
|
September 29, 2025
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Question on calculating IPs (cationic states) for L-shell orbitals with IP-EOM-CCSD or ADC(3)
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14
|
647
|
October 9, 2025
|
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Is CVS approximation available for IP-ADC(3)?
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0
|
305
|
October 9, 2025
|
|
Single Point immediately fails with DM alg and AUTOSAD guess
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4
|
352
|
October 8, 2025
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Keywords for printing <S^2> values using unrestricted TDDFT (RPA=2)
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2
|
519
|
October 7, 2025
|
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Clarification on RASSCF Calculation of Multiple Spin States in Q-Chem
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2
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369
|
October 6, 2025
|
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Fchk file size increased with Q-Chem 6.1?
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4
|
845
|
October 3, 2025
|
|
Irreducible representation of electrons
|
|
1
|
357
|
October 3, 2025
|
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Saving SCF Metadynamics Solutions
|
|
0
|
327
|
October 2, 2025
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