The chemical formula for carbon and chlorine depends on the specific compound you're asking about. Here are two possibilities:

* Carbon tetrachloride (CCl₄): This is a common compound where one carbon atom bonds with four chlorine atoms.

* Carbon monoxide (CO): While this doesn't directly involve chlorine, it's important to distinguish it from carbon tetrachloride.

To be more specific, please tell me what compound of carbon and chlorine you are interested in.