123isomer

123isomer is a web-based platform designed to facilitate the discovery and visualization of molecular structures, particularly focusing on stereoisomers—molecules with the same molecular formula and sequence of bonded atoms but differing in spatial arrangement. The site is particularly useful for chemists, students, and researchers studying stereochemistry, a branch of chemistry concerned with the spatial orientation of atoms in molecules.

The platform allows users to input a chemical structure or SMILES (Simplified Molecular Input Line Entry System) notation and generates all possible stereoisomers for that molecule. It provides visual representations, including 2D and 3D models, which help users distinguish between enantiomers (mirror-image isomers) and diastereomers (non-mirror-image isomers). This is especially valuable in fields like pharmaceuticals, where stereochemistry can significantly influence a drug’s efficacy and safety.

123isomer is accessible via a web browser and does not require installation, making it convenient for quick queries. The tool is free to use, though it may have limitations in handling very complex molecules. While it does not provide detailed computational chemistry analysis, it serves as an effective educational and exploratory resource for understanding stereoisomerism.

The platform is maintained by an anonymous developer, and its origins are not widely documented. It is often recommended as a supplementary tool alongside more advanced software like Avogadro, ChemDraw, or specialized stereochemistry databases. Users are encouraged to verify results with other sources, as automated tools may occasionally produce errors or oversimplifications.