Copper (II) reacts with HCPFPBH and forms buff coloured precipitate insoluble in many organic solvents like absolute alcohol, ether, benzene, chloroform etc. The Solid complex has molecular formula (C₁₉H₁₃N₂OFCl)₂Cu which melts at 202⁰C with decomposition. The infrared spectra of the complex was recorded in the range 4000-450cm^-1. The ligand molecule consists of a weak band at 2550 cm^-1. This confirms the presence of azomethine nitrogen in the ligand. This band is absent in the IR Spectrum of the complex confirming the involvement of this group in complexation . The strong band of the ligand at 1640 cm^-1 is due to C = NH⁺ group which shifts to lower frequency by 60 cm^-1. This confirms the formation of C = N -----Cu bond. The N – O stretching mode shifts to higher frequency from 930 cm^-1 to 960 cm^-1 this confirms the formation of N – O – Cu bond by replacement of N – O – H proton by Copper.Cu – N band appears at 460 cm^-1 which supports the formation of Cu – N bond. The positive value of volume susceptibility confirms that the complex is paramagnetic. TGA studies suggest that complex is thermally stable upto 202⁰C and melts with decomposition. At this temperature water molecules are absent which is also suggested by IR spectra of the complex. These studies support the use of N-Hydroxy-N-(4-Chloro) phenylN’-(4-Fluoro) phenyl benzamidine hydrochloride for gravimetric determination of Copper (II) in ores and alloys.