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Methyl Ion (CH3-) Formal Charge

The methyl ion (CH3) consists of a carbon (C) atom that is bonded to three hydrogen (H) atoms. Its molecular structure is shown below.

CH3 Formal Charge

Let us calculate the formal charges on C and H and then determine the formal charge of CH3.

Carbon

V = 4, N = 2, B = 6

Therefore,

qf = 4 – 2 – 6/2 = -1

Theformal charge on C in CH3is -1.

All Three Hydrogen Atoms

V = 1, N = 0, B = 2

Therefore,

qf = 1 – 0 – 2/2 = 0

The net formal charge is: -1 + 3 x 0 = -1

The formal charge of CH3is zero.

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