Table 2. Selected parameters (Å, Å2) for structural determinations following formulations as syn-1 to syn-3 .
| Parameter | syn -1 a | syn -2 | syn -3 |
|---|---|---|---|
| (XY = CO) | (XY = OO) | (XY = OC) | |
| Tc⋯Tc | 3.370 (3) | 3.369 (3) | 3.368 (3) |
| Average Tc—(μ-X) | 2.163 | 2.162 | 2.163 |
| X4—Y4 | 1.451 (14) | 1.441 (12) | 1.424 (11) |
| X5—Y5 | 1.470 (14) | 1.433 (14) | 1.415 (11) |
| U eq(X4) | 0.018 (2) | 0.034 (2) | 0.035 (2) |
| U eq(X5) | 0.019 (1) | 0.037 (2) | 0.038 (1) |
| U eq(Y4) | 0.083 (3) | 0.082 (3) | 0.044 (2) |
| U eq(Y5) | 0.112 (5) | 0.116 (5) | 0.061 (3) |
| ΔMSDA(X4—Y4) | 0.052 (8) | 0.036 (8) | 0.010 (6) |
| ΔMSDA(X5—Y5) | 0.040 (11) | 0.041 (11) | 0.008 (7) |
Note: (a) data taken from Zuhayra et al. (2008 ▸).