Abstract: The crystal of the title complex, is monoclinic with space group Pc. cell parameters a=0.9361(2),b=1.0519(3),c=1.2028(2)nm,β=91.01(2)?,V=1.1843(4)nm³. Z=4.final R=0.061.Zinc atom is coordinated in a tetrahedron arrangement to four non-esterified oxygen atoms.Two adjacent zinc atoms are connected by "O-P-O" bridge groups, forming an infinite one-dimensional chain coordinated polymer.The infrared spectra indicates formation of the O-P-S groups some important infrared bands have been interpreted.

Key words: bis-(dimethoxy phosphato) zinc, crystal structure, infrared spectra