Species with data from:

Kohn, D.W.; Chen, P., Vibrational structure in the photoelectron spectrum of cyclobutadiene as a probe of structure, J. Am. Chem. Soc., 1993, 115, 2844.

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. Cyclobutadiene (C₄H₄)
   
2. cyc-C4H4+ (C₄H₄⁺)