x-ray b3lyp/6-31g(d) S1-S2 2.056 2.100 C3-S2 1.788 1.837 O4-C3 1.218 1.211 C5-C3 1.457 1.472 N6-C5 1.401 1.408 C14-S1 1.733 1.751 S13-C14 1.757 1.780 C15-N6 1.474 1.471 H16-C15 0.990 1.089 H17-C15 0.990 1.094 C18-C15 1.511 1.526 H19-C18 0.990 1.092 H20-C18 0.990 1.092 Cl21-C18 1.796 1.817 S1-S2-C3 97.17 96.22 S2-C3-O4 120.98 119.97 C3-C5-N6 118.05 119.68 C5-N6-C7 117.05 117.37 N6-C7-C12 124.18 122.59 C7-C12-S13 124.79 121.92 C3-C5-C14 116.97 117.27 N6-C5-C14 124.85 122.74 C5-N6-C15 117.33 121.14 N6-C15-H16 108.65 107.78 N6-C15-H17 108.65 107.75 N6-C15-C18 114.44 114.52 C15-C18-H19 109.11 109.74 C15-C18-H20 109.11 111.85 C15-C18-Cl21 112.43 112.90 N6-C15-C18-Cl21 61.68 67.75 C5-N6-C15-C18 -112.99 -94.13 S1-S2-C3-O4 -173.54 -175.95 S1-S2-C3-C5 8.88 6.49 S2-C3-C5-N6 175.01 -177.39 S2-C3-C5-C14 -8.93 -3.57 C3-C5-N6-C7 151.35 143.29 C5-N6-C7-C12 24.20 30.73 N6-C7-C12-S13 -0.14 2.48 N6-C15-C18-H19 -177.12 -173.43 N6-C15-C18-H20 -59.51 -52.30 C5-N6-C15-H16 8.62 29.90 C5-N6-C15-H17 125.40 145.81