 Siloxene is structurally derived from layered polysilyne by replacing one-half of the hydrogen atoms with OH groups.It has the chemical formula Si2H2O (or [Si6H3(OH)3]x) and it is prepared by reacting calcium disilicide (CaSi2), which has a puckered layer of silicon atoms, with dilute hydrochloric acid.This yellow solid was prepared from that route as early as 1900 by Charles Schenck Bradley (1853–1929), a one-time associate of Thomas Edison.