Table 1. Selected bond lengths (Å).
| Cu1—N1 | 2.0053 (19) |
| Cu1—N2 | 2.0155 (18) |
| Cu2—N3 | 2.0148 (19) |
| Cu2—N4 | 2.0248 (18) |
| Cu1—O1W | 2.702 (2) |
| Cu2—O2W | 2.499 (2) |
| Cu1—N1 | 2.0053 (19) |
| Cu1—N2 | 2.0155 (18) |
| Cu2—N3 | 2.0148 (19) |
| Cu2—N4 | 2.0248 (18) |
| Cu1—O1W | 2.702 (2) |
| Cu2—O2W | 2.499 (2) |