| Main / Geometry Optimization For Electronically Excited Ionized Or Electron-attached StatesAnalytic gradients for the investigation of excited state/ionized state geometries and potential energy surfaces are available for CIS/TDA, CIS(D), EOM-CCSD(2), and EOM-CCSD. | 
 CFOUR is partially supported by the U.S. National Science Foundation.
 CFOUR is partially supported by the U.S. National Science Foundation.