title: Perchloro-2,5,8-triazaphenalenyl radical.
abstract: [reaction: see text] The unusually stable perchloro-2,5,8-triazaphenalenyl radical 1 and its twisted dechlorinated dimer 2 were synthesized and characterized by ESR spectroscopy and X-ray crystallography. The X-ray structure of dimer 2 shows that the double bond connecting the two triazaphenalene systems is strongly twisted. Dimer 2 has a dramatic color shift from the solid state to solution, which may be due to a change of the twisting angle between both states.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095-1569, USA.
authors.forename: Shijun
authors.initials: S
authors.lastname: Zheng
authors.forename: Joe D
authors.initials: JD
authors.lastname: Thompson
authors.forename: Ana
authors.initials: A
authors.lastname: Tontcheva
authors.forename: Saeed I
authors.initials: SI
authors.lastname: Khan
authors.forename: Yves
authors.initials: Y
authors.lastname: Rubin
mesh_terms: D018360:Crystallography, X-Ray; D006575:Heterocyclic Compounds, 3-Ring / Q000138:chemical synthesis* / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000138:chemical synthesis* / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: D006575:Heterocyclic Compounds, 3-Ring; D006843:Hydrocarbons, Chlorinated; C507580:perchloro-2,5,8-triazaphenalenyl radical