Species with data from:

Houle, F.A.; Beauchamp, J.L., Photoelectron spectroscopy of methyl, ethyl, isopropyl, and tert-butyl radicals. Implications for the thermochemistry and structures of the radicals and their corresponding carbonium ions, J. Am. Chem. Soc., 1979, 101, 4067.

8 matching species were found.

For each matching species the following will be displayed:

• Chemical name
• Chemical formula
• Structure image (if available)

Click on the name to see more data.

1. Methyl radical (CH₃)
   
2. Ethyl radical (C₂H₅)
   
3. Isopropyl radical (C₃H₇)
   
4. Tert-butyl radical (C₄H₉)
5. Cyclopentyl radical (C₅H₉)
   
6. 2-Norbornyl radical (C₇H₁₁)
   
7. tert-C4H9+ (C₄H₉⁺)
8. Ethyl radical-1,1-d2 (C₂H₃D₂)
   

© 2026 by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.

Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act.