Table 1. Selected geometric parameters (Å, °).
| Ni1—N1 | 2.061 (2) | Ni1—N21 | 2.165 (2) |
| Ni1—N11 | 2.159 (2) | ||
| N1i—Ni1—N1 | 180.0 | N1i—Ni1—N21 | 90.75 (9) |
| N1i—Ni1—N11 | 91.10 (9) | N1—Ni1—N21 | 89.25 (9) |
| N1—Ni1—N11 | 88.90 (9) | N11—Ni1—N21 | 92.40 (8) |
Symmetry code: (i)
.
| Ni1—N1 | 2.061 (2) | Ni1—N21 | 2.165 (2) |
| Ni1—N11 | 2.159 (2) | ||
| N1i—Ni1—N1 | 180.0 | N1i—Ni1—N21 | 90.75 (9) |
| N1i—Ni1—N11 | 91.10 (9) | N1—Ni1—N21 | 89.25 (9) |
| N1—Ni1—N11 | 88.90 (9) | N11—Ni1—N21 | 92.40 (8) |
Symmetry code: (i)
.