Tetrahedron Letters p. 6149 - 6152 (1986)
Update date:2022-08-18
Topics:
Turro, Nicholas J.
Cha, Yuan
Singlet-triplet intersystem crossing of methylene in perfluorohexane solution has been investigated by CIDNP.Evidence of this process is shown by the polarized absorption 1H-NMR signal of Cl3C-CH2D, a triplet product, which is obtained upon direct irradiation of diazirine in perfluorohexane solution containing saturated deuteriochloroform.These results are confirmed by product analysis as a function of dilution by perfluorohexane.The rate constant for intersystem crossing for singlet methylene to triplet methylene is evaluated as ca. 8E8 1/s from the data.
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