A method of forming a resistance variable device includes forming a first conductive electrode material on a substrate. The process for preparation of compound comprisesthe steps of agitating a compound of formula ,wherein R is hydrogen, NH4+ or an alkali metalin an organic solvent and in an inert atmosphere at a temperature of between 27\xb0 C. A clamp assembly is removably engaged to the cannula. The folded side includes an opening for inserting therein a hook of an adjacent cooling fin. A removable cover is also provided.