Table 1. Selected geometric parameters (Å, °).
| Cu1—N2 | 1.986 (3) | Cu2—N7 | 1.986 (4) |
| Cu1—N3 | 1.988 (4) | Cu2—N6 | 1.989 (4) |
| Cu1—N1 | 2.062 (4) | Cu2—N5 | 2.070 (4) |
| Cu1—Cl1 | 2.2701 (12) | Cu2—Cl3 | 2.2777 (12) |
| Cu1—Cl2 | 2.8505 (12) | Cu2—Cl4 | 2.9415 (12) |
| Cu1—Cl1i | 3.4056 (12) | Cu2—Cl3ii | 3.1645 (12) |
| N2—Cu1—N3 | 166.47 (15) | N7—Cu2—N6 | 163.80 (16) |
| N2—Cu1—N1 | 84.81 (14) | N7—Cu2—N5 | 85.50 (15) |
| N3—Cu1—N1 | 85.31 (14) | N6—Cu2—N5 | 85.18 (14) |
| N2—Cu1—Cl1 | 95.85 (11) | N7—Cu2—Cl3 | 95.55 (11) |
| N3—Cu1—Cl1 | 95.68 (11) | N6—Cu2—Cl3 | 95.56 (11) |
| N1—Cu1—Cl1 | 168.47 (11) | N5—Cu2—Cl3 | 171.82 (11) |
| N2—Cu1—Cl2 | 88.27 (11) | N7—Cu2—Cl4 | 81.07 (11) |
| N3—Cu1—Cl2 | 83.37 (11) | N6—Cu2—Cl4 | 86.35 (11) |
| N1—Cu1—Cl2 | 94.77 (10) | N5—Cu2—Cl4 | 93.74 (10) |
| Cl1—Cu1—Cl2 | 96.76 (4) | Cl3—Cu2—Cl4 | 94.44 (4) |
| N2—Cu1—Cl1i | 115.18 (11) | N7—Cu2—Cl3ii | 80.52 (11) |
| N3—Cu1—Cl1i | 74.19 (11) | N6—Cu2—Cl3ii | 113.16 (12) |
| N1—Cu1—Cl1i | 90.95 (10) | N5—Cu2—Cl3ii | 92.88 (10) |
| Cl1—Cu1—Cl1i | 78.32 (4) | Cl3—Cu2—Cl3ii | 79.32 (4) |
| Cl2—Cu1—Cl1i | 156.30 (3) | Cl4—Cu2—Cl3ii | 159.87 (3) |
Symmetry codes: (i) 
; (ii) 
.