GAUSSIAN

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Contents

Information

Authors/Maintainers

Summary

Gaussian 09 is the latest version of the Gaussian series of electronic structure programs, used by chemists, chemical engineers, biochemists, physicists and other scientists worldwide. Starting from the fundamental laws of quantum mechanics, Gaussian 09 predicts the energies, molecular structures, vibrational frequencies and molecular properties of molecules and reactions in a wide variety of chemical environments. Gaussian 09 models can be applied to both stable species and compounds which are difficult or impossible to observe experimentally (e.g., short-lived intermediates and transition structures). With Gaussian 09, you can thoroughly investigate the chemical problems that interest you. For example, not only can you minimize molecular structures rapidly and reliably, you can also predict the structures of transition states, and verify that the located stationary points are in fact minima and transition states. You can go on to compute the reaction path by following the intrinsic reaction coordinate (IRC) and determine which reactants and products are connected by a given transition structure. Once you have a complete picture of the potential energy surface, reaction energies and barriers can be accurately predicted. Fundamental algorithms:

  • Calculation of 1- & 2-electron integrals over any contracted gaussian functions
  • Conventional, direct, semi-direct and in-core algorithms
  • Linearized computational cost via automated fast multipole methods (FMM) and sparse matrix techniques
  • Network/cluster and shared memory (SMP) parallelism
  • Harris initial guess (much more accurate, especially for metals)
  • Initial guess generated from fragment guesses or fragment SCF solutions
  • Density fitting and Coulomb engine for pure DFT calculations, including automated generation of fitting basis sets
  • O(N) exact exchange for HF and hybrid DFT
  • 1D, 2D, 3D periodic boundary conditions (PBC) energies & gradients (HF & DFT)

The NIIFI has one GAUSSIAN site licence which is independent from the CPU count. Unlimited users can use it. The software’s price was calculated for these conditions.

Features

Architectural/Functional Overview

Usage Overview

  • If possible with small example - may be a link

Dependencies

HP-SEE Applications

  • MDCisplatin (Molecular Design of Platinum Group Metal Complexes as Potential Non-classical Cisplatin Analogues)
  • CompChem (QM, MM, and MD computation in chemistry)


Resource Centers

  • IFIN_Bio, RO
  • NCIT-Cluster, RO
  • NIIFI SC, HU

Usage by other projects and communities

  • If any

Recommendations for Configuration and Usage