title: Triplet ground state derivative of aza-m-xylylene diradical with large singlet-triplet energy gap.
abstract: Organic molecules with a strong preference for triplet ground states, in which the triplet state is below the lowest singlet state by ≥10 kcal/mol, are typically short-lived and mostly detected as reactive intermediates. We now report a triplet ground state derivative of aza-m-xylylene diradical with a large singlet-triplet energy gap (ΔE(ST)) of ∼10 kcal/mol, which is comparable to ΔE(ST) for the well-known reactive intermediate m-xylylene diradical. The aminyl diradical persists in solution at room temperature on the time scale of minutes.
authors.affiliation: Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304, USA. arajca1@unl.edu
authors.forename: Andrzej
authors.initials: A
authors.lastname: Rajca
authors.forename: Arnon
authors.initials: A
authors.lastname: Olankitwanit
authors.forename: Suchada
authors.initials: S
authors.lastname: Rajca
mesh_terms: D001372:Aza Compounds / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D015394:Molecular Structure; D011789:Quantum Theory; D013816:Thermodynamics; D014992:Xylenes / Q000737:chemistry*
chemical_list: D001372:Aza Compounds; D005609:Free Radicals; D014992:Xylenes