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Explain the molecular structures of phosphorus trichloride and phosphorus pentachloride. |
Answer» Solution :shape similar to ammonia. The phosphorus atoms is `sp_3` hybridised with ONE LONE pair of electron.  Phosphorus pentachloride is trigonal bipyramidal shape in gaseous and liquid phases. The phosphorus atom is `sp^(3)d` hybridized. In `PCl_(5)` , the three P-Cl equatorial BONDS are equivalent, while the two axial P-Cl bonds are longer than equatorial bonds. This is due to fact that axial bond pairs suffer greater REPULSIONS as compared to equatorial bond pairs. 
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