Table 1.

Distances between the highlighted atoms in Fig. 1 for bond analysis..

Bond type	Bond length (Å)	Bond type	Bond length (Å)
C1–C2	1.368	C9–C7	1.435
C2–C3	1.424	C9–C6	1.392
C3–C4	1.368	C9–C10	1.410
C4–C5	1.424	C10–C11	1.410
C5–C6	1.368	C12–C13	1.410
C6–C7	1.424	C13–C14	1.410
C7–C8	1.368	C5–C14	1.392
C1–C8	1.424	C4–C14	1.435