# Phosphorous Oxychloride (POCl_{3}) Formal Charge

In phosphorous oxychloride (POCl_{3}), phosphorous shares single covalent bonds with all three chlorine (Cl) atoms and a double covalent bond with the oxygen (O) atom. Its Lewis structure is shown below.

Let us calculate the formal charge of POCl_{3} by calculating the formal charges on P, O, and Cl.

**Phosphorous**

V = 5, N = 0, B = 8

Therefore,

q_{f} = 5 – 0 – 10/2 = 0

The formal charge on P in POCl_{3} is zero.

**Oxygen**

V = 6, N = 4, B = 4

Therefore,

q_{f} = 6 – 4 – 4/2 = 0

The formal charge on O in POCl_{3} is zero.

**Chlorine 1, Chlorine 2, and Chlorine 3**

V = 7, N = 6, B = 2

Therefore,

q_{f} = 7 – 6 – 2/2 = 0

The formal charge on Cl in POCl_{3} is zero.

The net formal charge is: 0 + 0 + 3 x 0 = 0

The formal charge of POCl_{3} is zero. The structure shown above is the most stable.