Table 3. Selected geometric parameters (Å, °) for 3 .
| Zn—O1 | 2.0771 (12) | Zn—O4 | 2.0607 (10) |
| Zn—O2 | 2.0611 (11) | Zn—N1 | 2.2722 (13) |
| Zn—O3 | 2.0645 (11) | Zn—N2 | 2.2533 (13) |
| O1—Zn—O2 | 87.50 (4) | O2—Zn—N2 | 89.57 (5) |
| O1—Zn—O3 | 101.58 (5) | O3—Zn—O4 | 87.96 (4) |
| O1—Zn—O4 | 88.49 (4) | O3—Zn—N1 | 168.61 (5) |
| O1—Zn—N1 | 89.28 (5) | O3—Zn—N2 | 89.09 (5) |
| O1—Zn—N2 | 168.94 (5) | O4—Zn—N1 | 88.92 (5) |
| O2—Zn—O3 | 90.18 (5) | O4—Zn—N2 | 94.86 (5) |
| O2—Zn—O4 | 175.16 (4) | N1—Zn—N2 | 80.27 (5) |
| O2—Zn—N1 | 93.76 (5) |