WinMopac7.21 is a powerful tool for semi-empirical calculations of chemical molecules.

Winmopac7.21

Russian version(Русская версия)||Home page at narod.ru|| Mirror in USA

WinMopac7.21 is a powerful tool for semi-empirical calculations of chemical molecules. This program has combined an old DOS version MOPAC7 with some improvements which we have made, such as a convenient windows interface and an integrated external molecular viewer(RasWin). The interface includes all editing functions, a setting menu and some other features. This program is compatible with Windows XP, Vista and Windows 7 (both 32 and 64 bit). Also, it runs well under WINE in both Ubuntu and Macintosh versions.

WinMopac7.21 is created by Dr. Roman Shchepin and Dmitriy Litvinov. We are especially thankful to Mikhail Andronov for his useful suggestions.

Copyright

       WinMopac7.21 is a FREEware which means that you can use it as long as you need, to make as many copies as you want and freely distribute it, provided that all the files are included and are unmodified and that no files have been added to the package. Please, distribute it by copying the original self-extracting archive file. You may NOT ask any money for the distribution. Also, we need to mention that mopac.exe file is not our property, it belongs to the U.S. government. Therefore, mopac.exe may be modified. For more information on the history of MOPAC and on copyright status of mopac.exe you can download mopac.man file from the our web site.
       RasWin is a molecular graphics program. Its sources of code are available for noncommercial use. Therefore, anybody can make changes in those sources of code and recompile them.
       However, you may NOT attempt to reverse compile, modify, translate or disassemble any parts of the software except mopac.exe. NOTE, that if you have modified mopac.exe , you may NOT distribute it as part of our program package any longer. If you want to put this component on a freeware/shareware CD-ROM or an other compilation, please, contact us before doing so, to be sure that you are not including old or incomplete stuff in the compilation. We would also appreciate it if we could get a free copy of the CD-ROM.
       This software is provided "as it is". In no event we, the authors, shall be liable for any consequential, special, incidental or indirect damages of any kind arising out of the delivery, performance or use of this software. This software has been written with great care but we do not warrant that the software is error-free. If you find any "bugs" or you have some suggestions, please, contact us. E-mail: winmopac@psu.ru
       We hope you'll enjoy using our program.

Here you can download our program: WinMopac7.21

See below a list of free programs
which can be used together with WinMopac7.21:

ACD labs "ChemFolder" can be used for drawing of molecular structures and saving them as Mopac Internal format. These matrices can be opened by our program. ACD labs "ChemFolder" can be obtained from: ACD/Labs, registration is free.
Follow steps below:
1) Download and Install ChemSketch
2) Draw the structure in ChemSketch
3) Open 3D View (ACD/Labs - 3D view)
4) Come back to ChemSketch
5) Select the structure (edit-select all)
6) Copy the structure to 3D View
7) Add hydrogens and optimize structure (Tools - 3D optimization)
8) Save it in MOPAC Z-matrix to "Your name.dat"
9) Open the file with our program

Also, the output file produced by any other chemistry drawing software can be converted to MOPAC internal format by Open Babel
Old version of "Babel" and "BabelWin" can be obtained right from our web site:
Babel version 1.06 by Pat Walters and Matt Stahl - babel.zip
BabelWin by Dr. Jeffrey.J. Grosper and Mahmood Bhimji bw.zip

Please visit our page for updates.