Related Experiment Video
Updated: Aug 7, 2026

Free Radicals in Chemical Biology: from Chemical Behavior to Biomarker Development
Published on: April 15, 2013
Radical-radical interaction through a saturated link: methylenebis-6-oxoverdazyl
David J R Brook1, Gordon T Yee
1Department of Chemistry, Santa Clara University, Santa Clara, California 95053, USA. djbrook@scu.edu
Abstract:
The diradical methylenebis(1,5-diisopropyl-6-oxoverdazyl) was synthesized by benzoquinone oxidation of the corresponding bis(tetrazane). The diradical crystallizes in the monoclinic space group C2/c with cell parameters a = 21.1411(8) A, b = 12.4781(5) A, c = 8.2457(3) A, beta = 108.638(2) degrees, V = 2061.15 A3, Z = 4. Magnetic measurements indicate the diradical has a singlet ground state and triplet excited state at 150 cm(-1). Interaction between the nonconjugated radical centers is also seen in the UV-vis spectrum as a broad shoulder near 500 nm that is not apparent in the spectrum of the monoradical.
Related Concept Videos
Radical Formation: Homolysis
Radical Formation: Elimination
Radical Reactivity: Overview
Radical Reactivity: Electrophilic Radicals
Radical Reactivity: Nucleophilic Radicals
Radical Reactivity: Intramolecular vs Intermolecular

