AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/753-structural-isomers
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Also Known As
Constitutional isomers, chain isomers, position isomers, functional group isomers
What is Structural Isomers?
Isomers with the same molecular formula but different connectivity (different bonding arrangements) of atoms. Types include chain isomers, position isomers, and functional group isomers. Structural isomers may have very different physical and chemical properties.
Properties & Characteristics
Structural isomers (constitutional isomers) are molecules with the same molecular formula but different connectivity of atoms — i.e., different structural arrangements. They differ in which atoms are bonded to which. For example, butane (CH₃CH₂CH₂CH₃) and isobutane ((CH₃)₃CH) are structural isomers of C₄H₁₀. Structural isomers generally have different physical and chemical properties.
Uses & Applications
The existence of structural isomers explains the diversity of organic compounds and their properties. Pharmaceutical research exploits structural isomerism to develop drugs with different biological activities. Isomer identification by spectroscopy is a fundamental analytical task.
Safety Information
Structural isomers can have very different toxicological and pharmacological profiles. Isomeric industrial chemicals may have different flammability and toxicity, requiring individual safety assessments.
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
SynonymsConstitutional isomers, chain isomers, position isomers, functional group isomers
Frequently Asked Questions
Isomers with the same molecular formula but different connectivity (different bonding arrangements) of atoms. Types include chain isomers, position isomers, and functional group isomers. Structural isomers may have very different physical and chemical properties.
The existence of structural isomers explains the diversity of organic compounds and their properties. Pharmaceutical research exploits structural isomerism to develop drugs with different biological activities. Isomer identification by spectroscopy is a fundamental analytical task.
Structural isomers can have very different toxicological and pharmacological profiles. Isomeric industrial chemicals may have different flammability and toxicity, requiring individual safety assessments.
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.
