Species with data from:

Pacansky, J.; Brown, D.W.; Chang, J.S., Infrared spectra of the isobutyl and neopentyl radicals. Characteristic spectra of primary, secondary, and tertiary alkyl radicals, J. Phys. Chem., 1981, 85, 17, 2562, https://doi.org/10.1021/j150617a029 .

2 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. Neopentyl radical (C₅H₁₁)
   
2. i-C4H9 (C₄H₉)
   

© 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.