Table 2.

Selected bond lengths and bond angles for compound 6a.

bond lengths		bond angles
atom numbers	geometric parameter (Å)	atom numbers	geometric parameter (°)
N1–C8 N1–C7 N2–C10 N3–C8 N3–C1 N1–C6 N6–C7	1.372 (3) 1.309(3) 1.344 (3) 1.397 (3) 1.490 (3) 1.377 (3) 1.421 (3)	C7–N1–C8 N2–N3–C1 C1–N3–C8 N3–C1–C6 C8–C9–C10 C1–C6–C5 N1–C7–C6 N1–C8–C9 N3–N2–C10 N2–N3–C8 N1–C8–N3	116.15 (19) 125.03 (16) 122.51 (18) 116.10 (17) 106.29 (17) 119.42 (19) 124.5 (3) 133.29 (19) 103.65 (17) 112.41(16) 121.56 (18)