Table 1. Selected geometric parameters (Å, °).
| S1—C7A | 1.7374 (13) | N2—C10 | 1.3326 (16) |
| S1—C2 | 1.7673 (12) | N3—C2 | 1.3051 (16) |
| O1—C9 | 1.2468 (15) | N3—C3A | 1.3879 (16) |
| N1—N2 | 1.3766 (14) | C2—C8 | 1.4348 (17) |
| N1—C9 | 1.3772 (16) | C3A—C7A | 1.4058 (18) |
| C7A—S1—C2 | 88.85 (6) | C7—C7A—S1 | 128.77 (11) |
| N2—N1—C9 | 109.59 (10) | C3A—C7A—S1 | 109.37 (9) |
| C10—N2—N1 | 108.87 (10) | C10—C8—C2 | 127.48 (11) |
| C2—N3—C3A | 110.45 (11) | C10—C8—C9 | 107.06 (11) |
| N3—C2—C8 | 124.55 (11) | C2—C8—C9 | 125.46 (11) |
| N3—C2—S1 | 115.65 (9) | O1—C9—N1 | 123.88 (11) |
| C8—C2—S1 | 119.80 (9) | O1—C9—C8 | 130.92 (12) |
| N3—C3A—C4 | 125.04 (12) | N1—C9—C8 | 105.19 (10) |
| N3—C3A—C7A | 115.66 (11) | N2—C10—C8 | 109.28 (11) |