Table 2. Experimental details.
| Crystal data | |
| Chemical formula | [Ni(C6H15NO3)2](C7H5O3)2·4H2O |
| M r | 703.37 |
| Crystal system, space group | Monoclinic, P21/n |
| Temperature (K) | 293 |
| a, b, c (Å) | 8.40515 (12), 21.4397 (3), 9.48944 (14) |
| β (°) | 106.1835 (15) |
| V (Å3) | 1642.27 (4) |
| Z | 2 |
| Radiation type | Cu Kα |
| μ (mm−1) | 1.50 |
| Crystal size (mm) | 0.32 × 0.14 × 0.12 |
| Data collection | |
| Diffractometer | Agilent Xcalibur Ruby |
| Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2014 ▸) |
| T min, T max | 0.912, 1.000 |
| No. of measured, independent and observed [I > 2σ(I)] reflections | 12555, 3399, 3066 |
| R int | 0.030 |
| (sin θ/λ)max (Å−1) | 0.629 |
| Refinement | |
| R[F 2 > 2σ(F 2)], wR(F 2), S | 0.038, 0.115, 1.03 |
| No. of reflections | 3399 |
| No. of parameters | 226 |
| No. of restraints | 3 |
| H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
| Δρmax, Δρmin (e Å−3) | 0.26, −0.44 |