Atom Query Properties

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Name

Description

.H+

Increases the number of total hydrogens (total number of hydrogen substituents).

.H-

Decreases the number of total hydrogens (total number of hydrogen substituents).

.v+

Increases the number of valence (total bond order).

.v-

Decreases the number of valence (total bond order).

.X+

Increases the number of connections (number of substituents including hydrogens).

.X-

Decreases the number of connections (number of substituents including hydrogens).

.R-

Increases the number of rings (number of rings the atom is a member of).

.R+

Decreases the number of rings (number of rings the atom is a member of).

.r+

Increases the smallest ring size (size of the smallest ring the atom is a member of).

.r-

Decreases the smallest ring size (size of the smallest ring the atom is a member of).

.rb+

Increases ring bond count (number of ring bonds next to the atom).

.rb-

Decreases ring bond count (number of ring bonds next to the atom).

.s+

Increases substitution count (number of non-hydrogen and isotopic hydrogen substituents).

.s-

Decreases substitution count (number of non-hydrogen and isotopic hydrogen substituents).

.h+

Increases the number of implicit hydrogens (number of implicit hydrogen substituents).

.h-

Decreases the number of implicit hydrogens (number of implicit hydrogen substituents).

.D+

Increases degree (equivalent to substitution count: number of non-hydrogen and isotopic hydrogen substituents).

.D-

Decreases degree (equivalent to substitution count: number of non-hydrogen and isotopic hydrogen substituents).

.u

Marks as an unsaturated atom (atom has double, triple or aromatic bond).

.a/A

Marks as aromatic/aliphatic (has aromatic bond).