The 16 CB11(CH3)(n)(CD3)(12-n)(center dot) Radicals with 5-Fold Substitution Symmetry: Spin Density Distribution in CB11Me12 center dot

Kaleta J., Tarabek J., Akdag A., Pohl R., Michl J.

INORGANIC CHEMISTRY, cilt.51, sa.20, ss.10819-10824, 2012 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 51 Sayı: 20
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1021/ic301236s
  • Dergi Adı: INORGANIC CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.10819-10824
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The syntheses of all 16 CB11(CH3)(n)(CD3)(12-n)(center dot) radicals with 5-fold substitution symmetry are described. The variation in the width of their broad and featureless electron paramagnetic resonance signals as a function of the deuteriation pattern is used to deduce the relative values of the average hyperfine coupling constants a(H) of the hydrogen atoms in the ipso (1), ortho (2-6), meta (7-11), and para (12) methyl groups, a(H)(i):a(H)(o):a(H)(m):a(H)(p) = (0.18 +/- 0.09):(0.71 +/- 0.02):(1.00 +/- 0.03):(0.52 +/- 0.05), and these can be compared with ratios expected from a B3LYP/EPRII calculation, 0.04:0.55:1:0.51.