Gaussian (software)

According to the most recent Gaussian manual, the package can do:{{cite web|url=http://www.gaussian.com/g_tech/g09ur.htm|title=Gaussian online manual|access-date=2010-06-15|archive-date=2016-11-22|archive-url=https://web.archive.org/web/20161122023351/http://www.gaussian.com/g_tech/g09ur.htm|url-status=dead}}

• Molecular mechanics
• AMBER
• Universal force field (UFF)
• DREIDING force field
• Semi-empirical quantum chemistry method calculations
• Austin Model 1 (AM1),{{cite journal |title= Development and use of quantum molecular models. 75. Comparative tests of theoretical procedures for studying chemical reactions|author1=Michael J. S. Dewar |author2=Eve G. Zoebisch |author3=Eamonn F. Healy |author4=James J. P. Stewart |journal= Journal of the American Chemical Society |volume= 107 |issue=19 |pages= 3902–3909 |year= 1985 |doi= 10.1021/ja00299a024}} PM3,{{cite journal |title= Optimization of parameters for semiempirical methods I. Method |author= James J. P. Stewart |journal= Journal of Computational Chemistry |volume= 10 |issue= 2 |pages= 209–220 |year= 1989 |doi= 10.1002/jcc.540100208|citeseerx= 10.1.1.457.684 }} CNDO, INDO, MINDO/3, MNDO
• Self-consistent field (SCF methods)
• Hartree–Fock method: restricted, unrestricted, and restricted open-shell
• Møller–Plesset perturbation theory (MP2,{{cite journal |title= Note on an Approximation Treatment form Many-Electron Systems |journal= Physical Review |volume= 46 |issue=7 |pages= 618–622 |year= 1934 |doi= 10.1103/PhysRev.46.618 |author1=C. Møller |author2=M. S. Plesset |bibcode=1934PhRv...46..618M|url= https://authors.library.caltech.edu/1753/1/MOLpr34.pdf }} MP3, MP4, MP5).
• Built-in density functional theory (DFT) methods
• B3LYP and other hybrid functionals
• Exchange functionals: PBE, MPW, PW91, Slater, X-alpha, Gill96, TPSS.
• Correlation functionals: PBE, TPSS, VWN,{{cite journal |last= Vosko |first= S.H. |author2=L. Wilk |author3=M. Nusair| title= Accurate spin-dependent electron liquid correlation energies for local spin density calculations: a critical analysis |journal= Canadian Journal of Physics |volume= 58 |pages= 1200–1211 |year= 1980 |doi= 10.1139/p80-159 |bibcode=1980CaJPh..58.1200V |issue= 8|url= http://www.escholarship.org/uc/item/23j4q7zm |doi-access= free }} PW91, LYP, PL, P86, B95
• ONIOM (QM/MM method) up to three layers
• Complete active space (CAS) and multi-configurational self-consistent field calculations
• Coupled cluster calculations
• Quadratic configuration interaction (QCI) methods
• Quantum chemistry composite methods – CBS-QB3, CBS-4, CBS-Q, CBS-Q/APNO, G1, G2, G3, W1 high-accuracy methods

Gaussian 70, Gaussian 76, Gaussian 80, Gaussian 82, Gaussian 86, Gaussian 88, Gaussian 90, Gaussian 92, Gaussian 92/DFT, Gaussian 94, and Gaussian 98, Gaussian 03, Gaussian 09, Gaussian 16.

Other programs named 'Gaussian XX' were placed among the holdings of the Quantum Chemistry Program Exchange. These were unofficial, unverified ports of the program to other computer platforms.

In the past, Gaussian, Inc. has attracted controversy for its licensing terms that stipulate that researchers who develop competing software packages are not permitted to use the software. Some scientists consider these terms overly restrictive. The anonymous group bannedbygaussian.org{{cite web |url=http://bannedbygaussian.org/ |archive-url=https://web.archive.org/web/20180810083536/http://bannedbygaussian.org/ |url-status=dead |archive-date=2018-08-10 |title=Banned By Gaussian}} has published a list of scientists whom it claims are not permitted to use GAUSSIAN software. These assertions were repeated by Jim Giles in 2004 in Nature.

{{cite journal

|author=Jim Giles

|year=2004

|journal=Nature

|title=Software company bans competitive users

|volume=429 |issue=6989 |page=231

|bibcode= 2004Natur.429..231G

|doi=10.1038/429231a

|pmid=15152213

|doi-access=free

}} The controversy was also noted in 1999 by Chemical and Engineering News

{{cite journal

|year=2004

|journal=Chemical and Engineering News

|title=Grumblings about Gaussian

|url=http://pubs.acs.org/isubscribe/journals/cen/82/i10/html/8210scic.html#Anchor-44867

|volume=82 |issue=10 |page=29

}}

{{cite journal

|title=Quantum Chemistry Uproar

|journal=Chemical and Engineering News

|volume=77 |issue=36 |pages=27–30

|doi=10.1021/cen-v077n036.p027

|year=1999

}} (repeated without additional content in 2004), and in 2000, the World Association of Theoretically Oriented Chemists Scientific Board held a referendum of its executive board members on this issue with a majority (23 of 28) approving the resolution opposing the restrictive licenses.{{cite web|url=http://www.ch.ic.ac.uk/watoc/resolution.html |title=WATOC discussion on Computational Software}}

Gaussian, Inc. disputes the accuracy of these descriptions of its policy and actions,{{cite web |url=http://www.gaussian.com/silly |title= Comments on the "Banned by Gaussian" Website}} noting that all of the listed institutions do in fact have licenses for everyone but directly competing researchers. They also claim that not licensing competitors is standard practice in the software industry and members of the Gaussian collaboration community have been refused licenses from competing institutions.

• List of quantum chemistry and solid-state physics software

{{Reflist|30em}}

• {{Official website|www.gaussian.com}}

{{Chemistry software}}

{{DEFAULTSORT:Gaussian}}

Category:Computational chemistry software