The electron-pair and molecular geometry oF PF5 are trigonal-bipyra- midal according to its Lewis structurc and VSEPR theory. Five covalent bonds must point to the corners of a trigonal bipyramid. Therefore, the P atom must have a single electron in each of five hybrid orbitals. the hybrid scheme is Sp3d is required.
Each of the five P-F sigma bond involves overlap of one of the phosphorus spec hybrid orbital with fluorine 2p orbital.
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