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ChemOffice.Com - CambridgeSoft

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Administrator<br />

In the Results In text box, specify the path to the<br />

directory where results are stored by typing or<br />

browsing.<br />

Save a customized job to appear as a Gaussian<br />

submenu item as follows:<br />

1. In the Menu Item Name text box, type the name<br />

of the job description.<br />

2. Click Save As.<br />

The Save dialog box appears.<br />

3. Browse to the Gaussian Job folder in the<br />

\Chem3D\C3D Extensions folder.<br />

NOTE: The file must be saved in the Gaussian Job<br />

folder in order for it to appear in the menu.<br />

4. Select the file type to save. For more<br />

information, see “Job Description File<br />

Formats” on page 198.<br />

5. Click Save.<br />

Job Description File<br />

Formats<br />

.jdf Format<br />

The .jdf format is a file format for saving job<br />

descriptions. Clicking Save within the dialog box<br />

saves modifications without the appearance of a<br />

warning or confirmation dialog box.<br />

Saving either format within the Gaussian Job folder<br />

adds it to the Gaussian submenu for convenient<br />

access.<br />

<strong>Com</strong>puting Properties<br />

To specify the parameters for computations to<br />

predict properties of a model:<br />

• From the Calculations menu, point to Gaussian<br />

and choose <strong>Com</strong>pute Properties.<br />

The <strong>Com</strong>pute Properties dialog box appears<br />

and displays the Properties tab with the top<br />

property of the menu preselected.<br />

Job description files are like Preferences files; they<br />

store the settings of the dialog box. You may save<br />

the file as either a .jdf or a .jdt type. You modify and<br />

save .jdf files more easily than .jdt files.<br />

.jdt Format<br />

The .jdt format is a template format intended to<br />

serve as a foundation from which other job types<br />

may be derived. The Minimize Energy and<br />

<strong>Com</strong>pute Properties job types supplied with<br />

Chem3D are examples of these. To discourage<br />

modification of these files, the Save button is<br />

deactivated in the dialog box of a template file.<br />

Creating a Gaussian<br />

Input File<br />

A Gaussian Input file contains the coordinates and<br />

geometry of the model and the Gaussian keywords<br />

taken from the settings of the dialog box.<br />

198•Gaussian <strong>Com</strong>putations<br />

<strong>CambridgeSoft</strong><br />

Job Description File Formats

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