What is the formal charge of carbon atom in the lewis structure of carbonyl sulfide (#OCS#)?

1 Answer
Aug 21, 2016

Answer:

To a first approx. the Lewis structure of carbonyl sulfide is the same as that of carbon dioxide. The formal charge of #C# is thus ZERO.

Explanation:

Given an #O=C=O#, or #S=C=O# Lewis structure, there are 8 bonding electrons around carbon, 4 of which this atom claims. And thus with 2 inner core electrons, the 6 electrons balance the nuclear charge to give a neutral carbon centre. Of course all the atoms in this molecule are formally neutral.

The #C=S# bond length is approx. #1.6xx10^-10*m#, the which is shorter than a regular #C-S# bond, approx. #1.8xx10^-10*m#.