A reaction structure query will retrieve reactions that include the reactants, reagents, or products that you draw, either as complete structures, or as substructures. You can apply substructure query features to narrow or broaden the search for the substructures embedded in the substances matched.
Other query features are specific to reaction structure queries and are used to focus the search on the reaction transformation:
Specify the reaction roles of the structures by drawing a reaction arrow.
Define the reaction role for each structure as product, reactant, reagent, reactant/reagent, or any role.
Marking reaction sites: Mark bonds that are changed (broken, formed, or change bond order) in the reaction.
Mapping atom pairs: Specify corresponding pairs of atoms present in the reactant and product.
Specifying a substance by functional group: Instead of drawing a specific structure, you can represent a reactant, reagent, or product by a functional group term (e.g., Acyclic Ketone).
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Drawing and Editing Structures