Gaussian 09 is the latest in the Gaussian series of programs. It provides state-of-the-art capabilities for electronic structure modeling. Gaussian 09 is licensed for a wide variety of computer systems. All versions of Gaussian 09 contain every scientific/modeling feature, and none imposes any artificial limitations on calculations other than your computing resources and patience.

The Gaussian 09 versions for Windows computers and Power-PC-based Mac OS X computers are known as Gaussian 09W and Gaussian 09M (respectively). Gaussian 09 for Intel-based Mac OS X computers is generally licensed in the same way as other Linux/UNIX versions. A single-CPU 32-bit version is also available as a shrink-wrap licensed product which is known as Gaussian 09IM.

All Linux/UNIX versions of Gaussian 09 can run on single CPU systems and in parallel on shared-memory multiprocessor systems. Gaussian 09W is available in separate single CPU and multiprocessor versions. Gaussian 09M is available in a single-CPU version only. For cluster and network parallel execution, the Linda parallel computing environment software must also be licensed. An updated version of Linda is required for all versions of G09.

Gaussian 09: Expanding the limits of computational chemistry

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’s 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).

Gaussian 09 provides the most advanced modeling capabilities available today, and it includes many new features and enhancements which significantly expand the range of problems and systems which can be studied. With Gaussian 09, you can model larger systems and more complex problems than ever before, even on modest computer hardware.

What Sets Gaussian 09 Apart from Other Programs?

Gaussian 09 produces accurate, reliable and complete models without cutting corners.

- A wide variety of methods makes Gaussian 09 applicable to the full range of chemical conditions and problem sizes and across the entire periodic table.
- Gaussian 09 provides state-of-the-art performance in single CPU, multiprocessor/multicore and cluster/network computing environments.
- Setting up calculations is simple and straightforward, and even complex techniques are fully automated. The flexible, easy-to-use options give you complete control over calculation details when needed.
- Results from all calculation types are presented in natural and intuitive graphical form by GaussView 5.