Table 2. Geometry and electron-density characteristics (ZDD−/ZDD+) of the N1 atom of AZM directly bound to the Zn atom in the structure with PDB code 3hs4 .

The correct tautomeric state data are highlighted in bold.

3hs4 AZM tautomers	1	2	3
Zn–AZM N1 (Å)	2.05	2.07	1.90
AZM N1 ZDD−/ZDD+	14.27/20.45	14.58/21.64	4.35/4.66