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ARC - Automatic Rate Calculator

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**Describe the bug** I was running CBS-QB3 calculation for some species. The last species that appears in `arc.log` was this one: `[O]C=CC=C=CO` : `Species C5H5O2[43] is not oriented correctly around...

Type: Bug

Two small fixes for the atom mapping module.

Module: Mapping

**Describe the bug** When parsing frequencies from Molpro's output, if the output has imaginary frequencies (as in the example output), then the function returns them as non-negative. example: ```python >>>...

Type: Bug
Module: Parser
Good first issue

**Describe the bug** A reaction family could not be found for the reaction C3H6-2 + O C3H6O. **How to reproduce** ```python from arc.rmgdb import make_rmg_database_object, load_families_only from arc.reaction import ARCReaction...

Type: Bug

The new added level of theory and other features allow us to find conformers considering solvation effect. It includes opening a subprocess to run multi_species opt job with solvent over...

Module: Scheduler
Module: Species
Module: Main
Module: Conformers

Due to acquiring a subscription to Azure, we need to update ARC to allow for the usage of Azure as well as ESS like QCHEM. Please see the list below...

Topic: ESS
Module: Scheduler
Type: Code Organization
Type: Environment
Module: Species
Module: Main
Module: Parser
Module: Conformers
Module: SSH
Type: trsh
Module: Converter
Topic: Server
Module: trsh

This PR includes QChem as an adapter and also provides updates to the Molpro adapter

Module: Scheduler
Module: Plotter
Module: Species
Module: Main
Module: Parser
Module: Converter
Module: Local
Module: trsh
Module: Mapping

Updated settings.py function for determining the path to the python environments Updated the channels we use for finding pkgs when installing pkgs to arc_env (and also alphabeticized)

We can consider adding an adapter for MRCC (https://www.mrcc.hu/index.php), which is a free ESS for non-commercial usage. It was used by [this study](https://www.sciencedirect.com/science/article/pii/S001021802100451X) and seems to give accurate energies, I...

Type: Feature

Added a method for generating TS structures from atom mapped reactants and products. The method works for unimolecular reactions, and at present is only implemented for isomerization reactions.

Module: Species
Module: Reaction
Module: rmgdb
Module: Converter
Module: Mapping