Table 4. X-ray crystallographic data for compounds 1–5.
| 1 | 2 | 3 | 4 | 5 | |
| Empirical formula | C15H31B2NO4 | C37H49MgN3O | C74H98Mg2N6O2 | C40H64MgBN3O2 | C102H132BMg2N6O2 |
| FW (g mol–1) | 311.03 | 1152.20 | 1152.20 | 654.06 | 1533.57 |
| Crystal system | Triclinic | Monoclinic | Monoclinic | Monoclinic | Monoclinic |
| Space group | P1 | P21/n | P21/n | P21/c | Cc |
| a (Å) | 6.3072(1) | 12.7410(2) | 22.7470(2) | 13.7058(2) | 12.3279(5) |
| b (Å) | 12.4643(3) | 12.9480(2) | 13.2640(1) | 13.1659(2) | 30.1877(9) |
| c (Å) | 12.5184(3) | 20.7600(3) | 24.9170(2) | 22.9509(3) | 26.5175(11) |
| α (°) | 101.1406(10) | 90 | 90 | 90 | 90 |
| β (°) | 100.1735(10) | 92.575(1) | 115.512(1) | 96.1770(10) | 102.622(2) |
| γ (°) | 103.8021(12) | 90 | 90 | 90 | 90 |
| Density (Mg m–3) | 1.133 | 1.118 | 1.128 | 1.055 | 1.058 |
| Z | 2 | 4 | 4 | 4 | 4 |
| μ (Mo Kα) (mm–1) | 0.078 | 0.083 | 0.084 | 0.077 | 0.074 |
| Reflections collected | 16 086 | 58 058 | 113 992 | 76 184 | 35 060 |
| Independent reflections | 3190 | 7818 | 15 492 | 9431 | 14 727 |
| R int | 0.0465 | 0.0658 | 0.0685 | 0.0814 | 0.1401 |
| R 1, wR2 [I > 2σ(I)] | 0.0495, 0.1087 | 0.0569, 0.1247 | 0.0561, 0.1192 | 0.0498, 0.1103 | 0.0771, 0.1602 |
| R Indices (all data) | 0.0613, 0.1137 | 0.0837, 0.1347 | 0.1025, 0.1405 | 0.0894, 0.1273 | 0.1605, 0.1978 |