Table 1. Selected geometric parameters (Å, °).
| S1—C2 | 1.703 (2) | S2—C12 | 1.733 (2) |
| S1—C5 | 1.731 (2) | S3—C2 | 1.759 (2) |
| S2—C6 | 1.762 (2) | S3—C31 | 1.819 (2) |
| C2—S1—C5 | 92.15 (12) | N1—C6—S2 | 115.18 (17) |
| C12—S2—C6 | 88.99 (12) | N1—C7—C12 | 114.8 (2) |
| C2—S3—C31 | 98.36 (11) | C7—C12—S2 | 109.94 (17) |
| C6—N1—C7 | 111.1 (2) | ||
| O1—C31—C32—C33 | 53.1 (2) | C32—C33—C34—C35 | 48.1 (3) |
| C31—O1—C35—C34 | 69.4 (2) | C33—C34—C35—O1 | −57.9 (3) |
| C31—C32—C33—C34 | −45.9 (3) | C35—O1—C31—C32 | −66.0 (2) |