A new salt Bis(o-xylylenediammonium) tetrachloride monohydrate, (C 8 H 14 N 2 ) 2 Cl 4 .H 2 O, produces a novel centrosymmetric organic-inorganic compound synthesized in an aqueous solution by slow evaporation technique. This compound has been crystallized in the orthorhombic space group Pnma and the following parameters obtained are a=9.0677(9) Å, b=24.282 (2) Å, c=9.4726 (8) Å, V=2085.7 (3)Å 3 and Z=4, at 150 K, it is characterized by X-ray diffraction, infrared, fluorescence and UV-Vis spectroscopy. The crystal packing is governed by the N-H•••Cl, O-H•••Cl hydrogen bonding interactions between the organic network and the inorganic one, which stabilize the crystal packing.Moreover to gain an insight into the behavior of these interactions, Hirshfeld surfaces analysis have been investigated. Theoretical calculations were performed using density functional theory (DFT) and were made by comparison with the experimentally determined structure to study the molecular structure with geometrical optimization, electronic and topological properties of OXDACl at B3LYP/6-311++G(d,p) level.