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Appendix K: Structural Query<br />

Features<br />

Overview<br />

To perform a substructure search in ChemFinder,<br />

you must first draw the query structure itself. Query<br />

structures can be drawn in many different<br />

programs, but we recommend using ChemDraw,<br />

and this Appendix is focused on using ChemDraw<br />

to draw query structures. For more information<br />

about the structure drawing and query capabilities<br />

of ChemDraw, please consult the ChemDraw<br />

User’s Guide.<br />

ChemFinder does its best to follow your<br />

instructions even if those instructions are<br />

contradictory. For example, you can create a query<br />

such as the following:<br />

Atoms<br />

Atom types specified in the query must match<br />

atoms at corresponding positions in the target.<br />

Hydrogen is an exception—see “Substituents” on<br />

page 678.<br />

Bonds<br />

All bonds explicitly drawn in the query must match<br />

in the target. For certain caveats, see<br />

“Stereochemistry” on page 679 and<br />

“Normalization” on page 681. ChemFinder<br />

recognizes the following standard bond types:<br />

Bond Type<br />

Description<br />

Chn<br />

This bond must not<br />

be in a ring.<br />

Single<br />

target must have single bond<br />

here<br />

That bond is already in a ring, so ChemFinder<br />

returns no hits for this query.<br />

General Properties<br />

ChemFinder allows the following general<br />

properties to be assigned to a query:<br />

Dashed<br />

Hashed<br />

Thick<br />

same as Single<br />

same as Single<br />

same as Single<br />

• Atom<br />

• Bond<br />

• Substituents<br />

• Charges and radicals<br />

• Isotopes<br />

• Stereochemistry<br />

• Normalization<br />

Wedged Hashed specifies stereochemistry down<br />

from the point end to the wide<br />

end<br />

Wedged<br />

specifies stereochemistry up<br />

from the point end to the wide<br />

end<br />

Appendices<br />

<strong>ChemOffice</strong> 2005/Appendix Structural Query Features • 677<br />

General Properties

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