crystal structure, physico-chemical characterization and hirshfeld surface analysis of a new 0d pyridinium dichlorido(dihydrogenphosphato-o,o′)zinc(ii)

A new zero-dimensional (0d) chloro-substituted zincophosphate monomer, namely pyridinium dichlorido(dihydrogenphosphato-o,o′)[zinc (ii), c5h5nh]zncl2(h2po4), was synthesized via slow evaporation method at room temperature and structurally characterized by single-crystal x-ray diffraction. the structure of this compound is made up of an alternate zno2cl2 and po2(oh)2 tetrahedra, forming isolated four-membered rings [(zncl2po2(oh)2)2]2− units accompanied by pyridinium cation. the crystal packing is consolidated by o–h···o, o–h···cl, n–h···cl and c–h···o hydrogen bonding system and offset π–π interactions, involving anti-parallel neighboring pyridinium rings (inter-centroid distance 3.65 å), which is supported by columbic attractions between c5h5nh+ cations and (zncl2po2(oh)2)− anions, and van der waals interactions, forming also a supramolecular 3d structure. we discuss quantitatively these interactions using the hirshfeld surfaces associated with 2d fingerprint plots. this compound was further characterized by solid-state nmr, infrared spectroscopies and dta/tga analysis. solid-state 31p and 13c mas-nmr spectroscopy results are in full agreement with the x-ray structure.