TABLE 2. Dipolar Couplings and Line Widths from CW Spectra.
| sample | temp (K) | |Dxx|, |Dyy|, |Dzz| (mT)a | line widths (mT) (x, y, z) |
|---|---|---|---|
| toluene/CHCl3 (4:1) | |||
| 1b (di) | 50 | 15.1, 15.1, 30.2 | 0.9, 0.9, 0.9 |
| 1c (mono) | 60 | 0.35, 0.4, 0.55 | |
| 2a (di) | 70 | 8.13, 28.0, 19.9 | 0.6, 0.5, 0.45 |
| 2b (di) | 50 | 11.2,b 26.1, 14.1b | 2.7,c 1.0, 0.5 |
| sucrose octaacetate | |||
| 1b (di) | 294 | 12.5, 12.5, 25.0 | 2.5, 1.5, 2.0 |
| 2a (di) | 294 | 9.2, 28.2, 19.0 | 0.7, 0.5, 0.45 |
| 2a (di)d | 86 | 8.4, 28.2, 19.8 | 0.7, 0.5, 0.53 |
| 2b (di) | 294 | 10.5,b26.4, 15.9b | 2.7,c1.5, 0.6 |
a
Components of the zero-field splitting tensor along the axes of the nitroxide radical.
b
Due to broad lines the values of Dxx and Dzz are uncertainbut were constrained to satisfy the relationship that Dxx + Dyy + Dzz = 0.
c
The spectra are relatively insensitive to this parameter, so the uncertainty is greater.
d
Based on the Q-band CW spectrum.