Experimental

R factor = 0.036; wR factor = 0.094; data-to-parameter ratio = 13.2. The structure of the title compound, [Zn(CH3COO)2-(C8H12N2)2], has one half molecule in the asymmetric unit. The ZnII atom is situated on a twofold rotation axis and is tetrahedrally coordinated by two N and two O atoms. The crystal packing displays intermolecular N—H O hydrogen bonds and intramolecular N—H O and N—H N hydrogen bonding. Related literature For the role of complexes in biochemical systems with zinc in tetrahedral coordination, see: Parkin (2004); Maret & Li (2009). For the structure of the corresponding 1,2-diamino-benzene complex, see: Mei et al. (2009). For an example of a structurally characterized tetramine complex with zinc in tetrahedral coordination, see: Xu et al. (1998). For an example carboxylate coordination in a similar complex, see: Harding (2001)