The formula BaCN₂ is incorrect and does not represent a known stable compound. Here's why:

* Barium (Ba) is an alkaline earth metal, forming a +2 cation (Ba²⁺).

* Cyanide (CN) is a polyatomic anion with a -1 charge (CN^-).

To balance the charges, the correct formula for the compound formed between barium and cyanide would be Ba(CN)₂. This is called Barium cyanide.