A stabilized cyclic alkene composition comprising one or more cyclic alkenes, and at least one stabilizer compound having the Formula (I), R1,R2,R3,R4,R5(C6)OH  Formula (I) wherein R′ through R5 can each independently be H, OH, C1-C8 linear, branched, or cyclic alkyl, C1-C8 linear, branched, or cyclic alkoxy or substituted or unsubstituted aryl, and wherein the stabilizer compound is present in an amount greater than 200 ppm up to 20,000 ppm and has a boiling point lower than 265° C. A method for forming a layer of carbon-doped silicon oxide on a substrate, which uses the stabilized alkene composition and a silicon containing compound.