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Property<br />

Description<br />

Property<br />

Description<br />

Administrator<br />

Connolly Molecular<br />

Surface Area<br />

(Angstroms 2 )<br />

Connolly<br />

Solvent-Excluded<br />

Volume (Angstroms 3 )<br />

Exact Mass (g/mole)<br />

Formal Charge<br />

(electrons)<br />

Molecular Formula<br />

The contact surface<br />

created when a spherical<br />

probe sphere<br />

(representing the<br />

solvent) is rolled over the<br />

molecular model.<br />

The volume contained<br />

within the contact<br />

molecular surface.<br />

The exact molecular<br />

mass of the molecule,<br />

where atomic masses of<br />

each atom are based on<br />

the most common<br />

isotope for the element.<br />

The net charge on the<br />

molecule.<br />

The molecular formula<br />

showing the exact<br />

number of atoms of each<br />

element in the molecule.<br />

Ovality<br />

Principal Moments of<br />

Inertia (X, Y, Z)<br />

(grams/mole<br />

Angstroms 2 )<br />

The ratio of the<br />

Molecular Surface Area<br />

to the Minimum Surface<br />

Area. The Minimum<br />

Surface Area is the<br />

surface area of a sphere<br />

having a volume equal to<br />

the Solvent-Excluded<br />

Volume of the molecule.<br />

<strong>Com</strong>puted from the<br />

Connolly Molecular<br />

Surface Area and<br />

Solvent-Excluded<br />

Volume properties.<br />

The Moments of Inertia<br />

when the Cartesian<br />

coordinate axes are the<br />

principal axes of the<br />

molecule.<br />

The surface area and volume calculations are<br />

performed with Michael Connolly’s program for<br />

computing molecular surface areas and volume (M.<br />

L. Connolly. The Molecular Surface Package. J. Mol.<br />

Graphics 1993, 11).<br />

For the latest information about the Connolly<br />

programs and definitions of the area and volume<br />

properties, see the following web site:<br />

http://connolly.best.vwh.net/<br />

Molecular Weight<br />

(atomic mass units)<br />

The average molecular<br />

mass of the structure,<br />

where atomic masses are<br />

based on the weighted<br />

average of all isotope<br />

masses for the element.<br />

NOTE: The default Probe Radius used in the calculation<br />

is 1.4 angstroms. You can change the Probe Radius value in<br />

the Parameters dialog box.<br />

The Principal Moments of Inertia are the diagonal<br />

elements of the inertia tensor matrix when the<br />

Cartesian coordinate axes are the principal axes of<br />

the molecule, with the origin located at the center of<br />

206•SAR Descriptors<br />

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

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