Feature list
Key methods
Key properties
MP2 and CC2 methods
- Restricted, unrestricted, and restricted open-shell wavefunctions
- Density Functional Theory (DFT) including most of the popular exchange-correlation functionals, i.e. LDA, GGA, hybrid, meta-GGA, double-hybrid fucntionals.
- Hartree-Fock (HF) and DFT response calculations: stability, dynamic response properties, and excited states
- Two-component relativistic calculations including spin-orbit interactions for all exchange- correlation functionals
- Second-order Møller-Plesset (MP2) perturbation theory for large molecules
- Second-order approximate coupled-cluster (CC2) method for ground and excited states
- Second-order coupled-cluster with triples correction CCSD(T) method for ground state energies
- Treatment of Solvation Effects with the Conductor-like Screening Model (COSMO)
- Novel developments like DFT+Dispersion corrections, explicitly correlated basis set for CCSD (F12) included
- Universal force field (UFF)
Key properties
- Structure optimization to minima and saddle points (transition structures)
- Analytical vibrational frequencies and vibrational spectra for HF and DFT, numerical for all other methods
- NMR shielding constants for DFT, HF, and MP2 method
- Ab initio molecular dynamics (MD)
- Efficient implementation of the Resolution of Identity (RI) and Multipole Accelerated Resolution of Identity (MARI) approximations allow DFT calculations for molecular and periodic systems of unprecedented sizes containing hundreds of atoms
- Ground state analytical force constants, vibrational frequencies and vibrational spectra
- Empirical dispersion correction for DFT calculations (including the latest DFT-D3 version from 2010)
- Eigenvalues of the electronic Hessian (stability analysis)
- Frequency-dependent polarizabilities and optical rotations
- Vertical electronic excitation energies
- Transition moments, oscillator and rotatory strengths of electronic excitations, UV-VIS and CD spectra
- Gradients of the ground and excited state energy with respect to nuclear positions; excited and ground state equilibrium structures; adiabatic excitation energies, emission spectra
- Exited state electron densities, charge moments, population analysis
- Excited state force constants by numerical differentiation of gradients, vibrational frequencies and vibrational spectra
MP2 and CC2 methods
- Efficient implementation of the Resolution of Identity (RI) approximation for enhanced performance
- Closed-shell HF and unrestricted UHF reference states
- Sequential and parallel (with MPI) implementation (with the exception of MP2-R12)
- Ground state energies and gradients for MP2, spin-component scaled MP2 (SCS-MP2) and CC2
- Ground state energies for MP2-R12
- Excitation energies for CC2, ADC(2) and CIS(D)
- Transition moments for CC2
- Excited state gradients for CC2 and ADC(2)