1. A chemical species or molecule containing two unpaired electrons or two radical sites.
Usage: chemistry; technical

1. Of, relating to, or containing two radical groups or unpaired electrons.
Usage: chemistry; technical

Examples

• Oxygen in its ground state is a biradical with two unpaired electrons.
• The biradical intermediate was detected using electron spin resonance spectroscopy.
• Carbenes can be classified as biradical species in certain electronic configurations.
• The reaction proceeds through a biradical transition state.
• Biradical character increases the reactivity of the molecule.