| C1—N1 | 1.334 (3) | C5—H5 | 0.9300 |
| C1—C2 | 1.401 (3) | C6—N4 | 1.432 (3) |
| C1—C6 | 1.435 (3) | N1—H1A | 0.8600 |
| C2—C3 | 1.392 (3) | N1—H1B | 0.8600 |
| C2—H2 | 0.9300 | N2—H2A | 0.8600 |
| C3—N2 | 1.344 (3) | N2—H2B | 0.8600 |
| C3—C4 | 1.434 (3) | N3—O1 | 1.229 (2) |
| C4—C5 | 1.377 (3) | N3—O2 | 1.233 (2) |
| C4—N3 | 1.437 (3) | N4—O3 | 1.222 (3) |
| C5—C6 | 1.377 (3) | N4—O4 | 1.236 (3) |
| N1—C1—C2 | 119.87 (19) | C5—C6—N4 | 116.47 (18) |
| N1—C1—C6 | 123.84 (19) | C5—C6—C1 | 120.45 (19) |
| C2—C1—C6 | 116.29 (19) | N4—C6—C1 | 123.07 (19) |
| C3—C2—C1 | 124.43 (19) | C1—N1—H1A | 120.0 |
| C3—C2—H2 | 117.8 | C1—N1—H1B | 120.0 |
| C1—C2—H2 | 117.8 | H1A—N1—H1B | 120.0 |
| N2—C3—C2 | 119.92 (18) | C3—N2—H2A | 120.0 |
| N2—C3—C4 | 123.51 (19) | C3—N2—H2B | 120.0 |
| C2—C3—C4 | 116.57 (18) | H2A—N2—H2B | 120.0 |
| C5—C4—C3 | 120.39 (19) | O1—N3—O2 | 121.21 (18) |
| C5—C4—N3 | 117.18 (18) | O1—N3—C4 | 119.26 (17) |
| C3—C4—N3 | 122.43 (19) | O2—N3—C4 | 119.52 (17) |
| C4—C5—C6 | 121.69 (19) | O3—N4—O4 | 121.72 (17) |
| C4—C5—H5 | 119.2 | O3—N4—C6 | 119.01 (18) |
| C6—C5—H5 | 119.2 | O4—N4—C6 | 119.27 (18) |