Table 4. Regularities in the C–N–C Angle Values of Adenine Ligand within the Adenine-MOF Crystal Structures Reported in the Literature.

	N site nonprotonated	N site protonated
C2–N1–C6	119 ± 4°	124 ± 1°
C2–N3–C4	112 ± 2°	NA
C5–N7–C8	103 ± 1°	107 ± 2°
C4–N9–C8	103 ± 1°	106 ± 1°