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Limitations<br />

The MDL MolFile format does not support<br />

non-integral charges in the same way as Chem3D<br />

Pro. For example, in a typical MDL MolFile format<br />

file, the two oxygens in a nitro functional group<br />

(NO 2 ) contain different charges: -1 and 0. In<br />

Chem3D models, the oxygen atoms each contain a<br />

charge of -0.500.<br />

FORTRAN Formats<br />

The FORTRAN format for each record of the<br />

MDL MolFile format is as follows:<br />

Line<br />

Number<br />

Description<br />

1 Molecule name<br />

(file name)<br />

2 Blank line<br />

FORTRAN<br />

Format<br />

A<br />

4 Number of atoms<br />

Number of bonds<br />

5–23 Atom<br />

coordinates,<br />

atomic symbol<br />

24–42 Bond id, from<br />

atom, to atom,<br />

and bond type<br />

MSI MolFile<br />

5I3<br />

3F10.4,1X,A2,5I3<br />

6(1X,I2)<br />

The MSI MolFile is defined in Chapter 4,<br />

“Chem-Note File Format” in the Centrum:<br />

Chem-Note Application documentation, pages<br />

4-1 to 4-5. The following is a sample MSI MolFile<br />

file created using Chem3D Pro for cyclohexanol<br />

(the line numbers are added for purposes of<br />

discussion only):<br />

3 Blank line<br />

1 ! Polygen 133<br />

2 Polygen Corporation: ChemNote molecule file (2D)<br />

3 * File format version number<br />

4 90.0928<br />

5 * File update version number<br />

6 92.0114<br />

7 * molecule name<br />

8 cyclohexanol-MSI<br />

9 empirical formula<br />

10 Undefined Empirical Formula<br />

11 * need 3D conversion?<br />

12 0<br />

Appendices<br />

<strong>ChemOffice</strong> 2005/Appendix File Formats • 631<br />

MSI MolFile

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