بفرمایید و موفق باشید:
http://kewlfile.com/dl/102711956829/sdarticle.pdf
http://kewlfile.com/dl/102711962475/sdarticle_001.pdf
Molecular Structures of PCl4F, PCl3F2, and PCl2F3: Pure Chlorine Nuclear Quadrupole Resonance and Low Temperature F19 Nuclear Magnetic Resonance Spectra...