Actually, cyanide isn't a molecule, it's a polyatomic anion, charge -1. In most cases, cyanide is produced in the form of Sodium Cyanide (NaCN), which is the stuff people dissolve in people's drinks when they want to assassinate them. NaCN itself isn't poisonous, however, it reacts with the Hydrochloric acid in your stomach to form Hydrogen cyanide gas (HCN), which is very poisonous. Interestingly, in Russia, an attempt on Rasputin's life was made with cyanide, however it did not kill him. When you are a baby, your stomach is basic, not acidic, and some people never develop stomach acid - thus HCN doesn't form. Rasputin was one of these people, and a myth spread that he was invincible when he didn't die. And who said chemistry was boring? - Reiginko