Isotropic and solid stateESR spectra of the radical ion pairs of 2,4,6-tri-tert-butyl thiobenzaldehyde

The sodium and potassium radical ion pairs of 2,4,6-tri-tert-butyl thiobenzaldehyde and of its ring-deuterated analog have been generated in ethereal solutions andf studied by means of electron spin resonance spectroscopy. From the magnitude of the 13-C hyperfine splitting it has been inferred that in this radical anion the deviation of the aromatic ring from coplanarity with the CHS plane is smaller than in the diamagnetic precursor. The soild state spectrum of the deuterated species has also been interpreted and the g and proton hyperfine tensors have been determined.