Organic Chemistry
Structure, naming, isomers and reaction logic — from molecules to mechanisms.
Select what you want to expolre.
IUPAC Nomenclature
Draw a structure → Generate name. One workflow for both non-aromatic and aromatic systems.
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SMILES
🧩 Isomers v1 — Write Isomers from Molecular Formula
This tool generates all constitutional isomers within the verified domain below:
1. Acyclic hydrocarbons: C₁–C₉ and derivatives
2. Non-aromatic monocyclic hydrocarbons: C₃–C₇ and derivatives
3. Aromatic monocyclic hydrocarbons (benzene core): C₆–C₉ and derivatives
Read more about what “derivatives” means
Step 1 — TYPE (computing from HDI)
Step 2 — FORM (drawing carbon skeletons)
Step 3 — CHANGE (positioning of monovalent atom/group)
Which monovalent atom/group to attach?
ON = show drawings (HDI=1 and HDI=2 cyclic). OFF = show the old text output (debug).
v1 rule: only carbons with available valence (implicit H) can receive a monovalent group (–H, –X, –OH, –NH₂). Applies to open-chain and cyclic skeletons.
Forbidden carbons are: (1) symmetry‑equivalent duplicates (red dots) and (2) quaternary carbons (green dots, degree 4).
Step 4 — INSERT (divalent group into C–C bond)
Choose a divalent atom/group to insert into the carbon skeleton. Results are symmetry-filtered (one representative per equivalent C–C bond).
Stereoisomers
1. Structural Isomers
2. Stereochemical Analysis
Select a structure to analyze.