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You can display several measurements sequentially<br />

in the table. The following table shows the bond<br />

lengths and angles for Ethene.<br />

When the Measurements table is not visible, the<br />

standard measurements are taken from the<br />

parameter tables.<br />

To specify optimal values for particular<br />

measurements, edit the value in the Optimal<br />

column.<br />

bond<br />

lengths<br />

bond<br />

angles<br />

{<br />

{<br />

Chem3D also uses the optimal values with the<br />

Dock command. When you choose Dock from the<br />

Structure menu, Chem3D reconciles the actual<br />

distance between atoms in two fragments to their<br />

optimal distances by rigidly moving one fragment<br />

relative to the other.<br />

Non-Bonded Distances in<br />

Tables<br />

Editing Measurements<br />

If you select a measurement in the Measurements<br />

table, the corresponding atoms are selected in the<br />

model window. If you select atoms in your model,<br />

any corresponding measurements are selected.<br />

To change the value of a measurement:<br />

1. Select the text in the Actual column.<br />

2. Type a new measurement value in the selected<br />

cell.<br />

3. Press the Enter key<br />

The model reflects the new measurement.<br />

When atoms are deleted, any measurements that<br />

refer to them are removed from the Measurements<br />

table.<br />

Optimal Measurements<br />

Optimal values are used instead of the<br />

corresponding standard measurements when a<br />

measurement is required in an operation such as<br />

Clean Up Structure. Optimal measurements are<br />

only used when the Measurements table is visible.<br />

To display non-bonded atom measurements:<br />

1. Select the atoms.<br />

2. From the Structure menu, point to<br />

Measurements and choose Set Distance<br />

Measurement.<br />

The measurement between the selected atoms<br />

is added to the table.<br />

non-bonded distance<br />

Showing the Deviation from Plane<br />

The Deviation from Plane command allows you to<br />

compute the RMS Deviation from the least squares<br />

plane fitted to the selected atoms in the model.<br />

<strong>ChemOffice</strong> 2005/Chem3D Inspecting Models • 103<br />

Measurement Table

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