Table 3. 13C Isotropic and Dipolara Couplings in Methanol Radical (r), Malonic Acid Radical (s), and Semidione Radical Anion (t).
nuclei | aiso [MHz] | Tx [MHz] | Ty [MHz] | Tz [MHz] | |
---|---|---|---|---|---|
r (C1) | calc.d | 131.7 | −74.5 | −73.4 | +147.6 |
calc.e | 122 | −73 | −72 | +145 | |
exp. | 128b | ||||
s (C2) | calc.d | 64.7 | −65.4 | −65.0 | 130.4 |
calc.e | 69 | −63 | −63 | 126 | |
exp.c | 93 | −50 | −70 | 120 | |
t (C1) | calc.d | −5.8 | −19.3 | −15.0 | 34.31 |
calc.e | 2 | −20 | −16 | 36 |
Dipolar tensor defined as [-T, -T, 2T]. “Perpendicular” components of rhombic tensors averaged.
Reference (54).
Cole, T.; Heller, C. J. Chem. Phys.1961, 34, 1085.
Calculated at UB3LYP/IGLOIII// UB3LYP/B3LYP/6−31G(d) level using the energetically most favorable conformer.
Calculated at BLYP/TZ2P level with ADF2007.1 (SCM, Theoretical Chemistry, Vrije Universiteit, Amsterdam, The Netherlands).