Table 1. Selected bond lengths (Å).
| Cu1—O1 | 1.985 (4) |
| Cu1—O4 | 1.961 (5) |
| Cu1—O6 | 1.963 (4) |
| Cu1—O8 | 1.956 (5) |
| Cu1—N1 | 2.215 (5) |
| Cu1—Cu | 2.6576 (9) |
| Cu2—O2 | 1.968 (4) |
| Cu2—O3 | 2.001 (5) |
| Cu2—O5 | 1.957 (5) |
| Cu2—O7 | 1.981 (5) |
| Cu2—N3 | 2.208 (5) |
| Cu1—O1 | 1.985 (4) |
| Cu1—O4 | 1.961 (5) |
| Cu1—O6 | 1.963 (4) |
| Cu1—O8 | 1.956 (5) |
| Cu1—N1 | 2.215 (5) |
| Cu1—Cu | 2.6576 (9) |
| Cu2—O2 | 1.968 (4) |
| Cu2—O3 | 2.001 (5) |
| Cu2—O5 | 1.957 (5) |
| Cu2—O7 | 1.981 (5) |
| Cu2—N3 | 2.208 (5) |