RCACNone

RCACNone is a term used in computational chemistry software related to the Restricted Active Space (RAS) method, which helps in studying complex molecules by focusing on key electrons and orbitals. "None" indicates that no RAS constraints or specific restrictions are applied during the calculation. Essentially, it means the software is performing an unrestricted or general calculation without limiting how electrons are distributed, allowing for a comprehensive analysis of the molecule's electronic structure without predefined constraints.