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Frequency calculation speedup
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1
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523
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February 19, 2026
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What is the correct input for the GEOM_OPT_MODE
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2
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423
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February 19, 2026
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Large number of imaginary frequencies with ROKS and delta SCF
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1
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400
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February 19, 2026
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Ehrenfest Molecular Dynamics
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2
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377
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February 19, 2026
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S1 Geom optimization based on TDDFT and delta SCF approach
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11
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732
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February 18, 2026
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Q-Chem license on new MacOS
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0
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399
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February 17, 2026
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Stuck CCSD frequency calculation
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2
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434
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February 16, 2026
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Issue with designing functionals
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4
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419
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February 15, 2026
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COSMO input file
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2
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362
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February 13, 2026
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VQCCD single point calculation issue
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0
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336
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February 13, 2026
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RIXS with TDDFT
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0
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320
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February 12, 2026
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Wrong multiplicity for large multiplicity element when using projection based embedding
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3
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339
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February 12, 2026
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Ground state out of equilibrium calculation
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3
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483
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February 11, 2026
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Is it possible to use the NTO-rotated orbitals (for a specific TDDFT state) as the MO set in a subsequent Q-Chem job?
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8
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898
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February 9, 2026
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CASSCF with Nonadiabatic Coupling
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1
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318
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February 6, 2026
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Complex Scaling on Q-Chem
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3
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805
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February 6, 2026
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SOC for Diabatic-State-Based Methods
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3
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486
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February 2, 2026
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Visualization/export of SF-TDDFT orbitals
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5
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854
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January 27, 2026
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Error while running frequency calculation
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4
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479
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January 27, 2026
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Frozen atoms move during optimization
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2
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586
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January 27, 2026
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Truncation of non-bonded interactions in QM/MM
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1
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390
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January 26, 2026
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Webinar 85: XCIS-CVS: Core-level Spectroscopy in Q-Chem
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0
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464
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January 23, 2026
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How to read saved scratch file for hessian
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1
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456
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January 22, 2026
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Issue with FRAGMO Optimization: Structural Distortion
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1
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408
|
January 20, 2026
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MRSF Transition dipole moment
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2
|
483
|
January 20, 2026
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Single Na ion calculation using MP2
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2
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489
|
January 16, 2026
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Using SF-TDDFT single-point energies for TS optimized at DFT level
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1
|
459
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January 13, 2026
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Which value to choose when calculating SOC?
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3
|
509
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January 13, 2026
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Energy conservation problems during dynamics , bond breaking and forming for collision reaction
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1
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449
|
January 11, 2026
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Trouble using EOM-CCSD, with frozen core
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9
|
556
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January 9, 2026
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