Arrive at the lewis structure of pcl5 and xef4 using the steps indicated in your unit
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Centarl atom is P
Number of valence electrons of P is 5
Number of valence electrons of Cl is 7
Total number of valence electrons in the molecule is 5 + 7*5 = 40 valence electrons
Place the bonding pair of electrons between each pair of adjacent atoms to give a single bond. Beginning with the terminal atoms, add enough electrons to each atom to give each atom an octet (we will get Lewis structure of PCl5):
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Explanation:
According to this explanation, the acceptor orbital (empty p orbital) on boron is involved to a greater extent in n bonding in BF3 and BCl3 than in BBr3, the Lewis acidity of BF3 and BCl3 are diminished relative to BBr3. Boron trichloride is expected to be the stronger Lewis acid of the two for two reasons.
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