Atom query properties dialog performs a quick access to the most frequently used query properties in Advanced tab of Atom properties dialog.
Available from Atom Toolbar Query atoms...
combo-box or .
shortcut.
Property | Tool | Available values | |
---|---|---|---|
Total Hydrogen (H) | Total number of hydrogen substituents. | .H+ | H0-H4 |
.H- | H4-H0 | ||
Implicit Hydrogen (h) | Number of implicit hydrogen substituents. | .h+ | h0-h4 |
.h- | h4-h0 | ||
Bond order (v) | Total bond order. (Some cases it is referred as valence.) | .v+ | v0-v8 |
.v- | v8-v0 | ||
Connections (X) | Number of substituents including hydrogens. | .X+ | X0-X3 |
.X- | X3-X0 | ||
Ring count (R) | Number of rings the atom is a member of. | .R+ | R0-R6 |
.R- | R6-R0 | ||
Smallest ring size (r) | Size of the smallest ring the atom is a member of. | .r+ | r0-r30 |
.r- | r30-r0 | ||
Ring bond (rb) | Number of ring bonds next to the atom. | .rb+ | rb0-rb4 |
.rb- | rb4-rb0 | ||
.rb* | as drawn | ||
Substitutions (s) | Substitution count: the number of non-hydrogen substituents plus number of isotopic hydrogen substituents. | .s+ | s0-s6 |
.s- | s6-s0 | ||
.s* | as drawn | ||
Unsaturated (u) | Unsaturated atom: atom that has double, triple or aromatic bond. | .u | u |
Aromaticity (a/A) | It defines whether the atom has at least one aromatic bond (a) or only aliphatic (A) bonds. | .a/A | a, A |