Search for Isomers

Search Criteria

Molecular Formula *

Enter the exact molecular formula (e.g., C7H6O2). Must include C and H.

Select functional groups or structural features that MUST be present.

Carbon Types

Acetylenic Carbon (sp alkyne) (acetylenic_carbon)

Alkyl Carbon (sp3) (alkyl_carbon)

Allenic Carbon (allenic_carbon)

Aromatic Carbon (aromatic_carbon)

Vinylic Carbon (sp2 alkene) (vinylic_carbon)

Halogens

Acyl Halide (R-COX) (acyl_halide)

Alkyl Halide (C-X) (alkyl_halide)

Halogen Atom (halogen)

Oxygen Groups

Acidic Hydroxyl (hydroxyl_acidic)

Alcohol (Aliphatic OH) (alcohol)

Enol (C=C-OH) (enol)

Ether (R-O-R) (ether)

Hydroxyl (-OH) (hydroxyl)

Peroxide (R-O-O-R) (peroxide)

Phenol (Ar-OH) (phenol)

Phosphorus Groups

Phosphoric Acid Group (phosphoric_acid)

Phosphoric Ester Group (phosphoric_ester)

Required Number of Signals

Required Simplified Ratio

Enter positive integers separated by colons. Order doesn't matter (e.g., 1:3 is same as 3:1).