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ChemOffice.Com - CambridgeSoft

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Administrator<br />

Adding Parameters to<br />

MOPAC<br />

Parameters are in constant development for use<br />

with PM3 and AM1 potential functions. If you find<br />

that the standard set of parameters that comes with<br />

CS MOPAC does not cover an element that you<br />

need, for example Cu, you can search the literature<br />

for the necessary parameter and add it at run time<br />

when performing a MOPAC job. This flexibility<br />

greatly enhances the usefulness of MOPAC.<br />

You can add parameters at run time using the<br />

keyword EXTERNAL=name, where name is the<br />

name of the file (and its full path) containing the<br />

additional parameters.<br />

A description of the required format for this file can<br />

be found in Figure 3.4, page 43 of the MOPAC<br />

2000 V.1.3 manual included on the CD-ROM.<br />

676• MOPAC <strong>CambridgeSoft</strong><br />

Adding Parameters to MOPAC

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