Sulfur chloride is not called "mono chloride." That's because there are multiple sulfur chlorides, each with its own name based on the number of sulfur and chlorine atoms:

* Sulfur monochloride (S₂Cl₂): This is the most common form of sulfur chloride. It has two sulfur atoms and two chlorine atoms.

* Sulfur dichloride (SCl₂): This compound has one sulfur atom and two chlorine atoms.

The prefix "mono-" in "monochloride" implies there is only one chlorine atom. However, neither of the common sulfur chlorides has only one chlorine atom.

In summary:

* "Mono chloride" is not a valid name for any sulfur chloride.

* The correct names are "sulfur monochloride" (S₂Cl₂) and "sulfur dichloride" (SCl₂).