Table 1. Selected geometric parameters (, ).
| N1C1 | 1.470(2) | N3C7 | 1.455(2) |
| N1C5 | 1.470(2) | N3C4 | 1.458(2) |
| N1C3 | 1.480(2) | N4C5 | 1.444(2) |
| N2C2 | 1.449(3) | N4C6 | 1.456(2) |
| N2C6 | 1.454(3) | N4C8 | 1.457(3) |
| N2C4 | 1.462(2) | Cl1C14 | 1.7534(16) |
| N3C3 | 1.446(2) | O11C11 | 1.356(2) |
| N1C1C2N2 | 10.4(3) | N3C7C8N4 | 9.0(3) |