Lewis structure of PCl5

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Step method to draw lewis structure of phosphorous penta chloride

Step 1: Find valence e- for all atoms. Add them together.

P:5
C:7x5=35

Total=40

Step2: Find octet e- for each atom and add them together.

P:10*
Cl:8x5=40

Total=50

Phosphorous gets 10 electrons since it should make 5 bonds with surrounding atoms.

Step3: Gives you bonding e-. Subtract step 1 total from step 2

50-40=10e-

Step 4: Find number of bonds by diving the number in step 3 by 2(because each bond is made of 2 e-)

10e-/2= 5 bond pairs

Step 5: Find the number of nonbonding (lone pairs) e-. Subtract step 3 number from step 1.

40-10= 30e-=15 lone pairs

Use information from step 4 and 5 to draw the lewis structure.

PCl5 lewis structure

Lewis dot structure of PCl5

Alternatively a dot method can be used to draw the lewis structure.
Calculate the total valence electrons in the molecule.

P:5
C:7x5=35

Total=40

Put put phosphorous in center and chlorines on sides.
Put a pair of electrons connecting the side atom with central atom.Put remaining electrons on the side atoms.

PCl5 lewis dot structure