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ChemOffice.Com - CambridgeSoft

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To generate surfaces from MOPAC or Gaussian,<br />

you must choose Molecular Surfaces as one of the<br />

properties calculated by these programs. The<br />

surface types and the calculations necessary to<br />

display them are summarized in the following table.<br />

NOTE: Spin Density map requires that MOPAC or<br />

Gaussian computations be performed with an open shell<br />

wavefunction.<br />

Surface<br />

Type<br />

Extended<br />

Hückel<br />

MOPAC<br />

Solvent NA NA NA<br />

Accessible a<br />

Connolly<br />

Molecular<br />

Yes Yes Yes<br />

Gaussian<br />

Surface<br />

Type<br />

with Partial<br />

Charges<br />

with<br />

Molecular<br />

Electrostatic<br />

Potential<br />

map<br />

Total Spin<br />

Density<br />

Molecular<br />

Electrostatic<br />

Potential<br />

Extended<br />

Hückel<br />

MOPAC<br />

Yes Yes Yes<br />

No Yes Yes<br />

No Yes Yes<br />

No Yes Yes<br />

Gaussian<br />

Total<br />

Charge<br />

Density<br />

with<br />

Molecular<br />

Orbital map<br />

with Spin<br />

Density<br />

map<br />

Yes Yes Yes<br />

Yes Yes Yes<br />

No Yes Yes<br />

Molecular<br />

Orbitals<br />

Yes Yes Yes<br />

a.<br />

Calculated automatically from parameters<br />

stored in the Chem3D parameters tables.<br />

This surface is always available with no<br />

further calculation.<br />

Setting Molecular Surface Types<br />

Chem3D offers four different types of surface<br />

displays, each with its own properties. These types<br />

are shown in the following table:<br />

<strong>ChemOffice</strong> 2005/Chem3D Displaying Models • 93<br />

Molecular Surface Displays

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