Complex sentence: The procedure used by Arkema begins with treatment of cyclododecane with nitrosyl chloride, resulting in the unstable nitrosocyclododecane, which undergoes tautomeric transformation to the cyclododecanone oxime, which again is amenable to Beckmann rearrangement.
Split into simpler sentences: The procedure used by Arkema also begins cyclododecane, which is treated with nitrosyl chloride, resulting in the nitrosocyclododecane. This unstable species undergoes tautomeric transformation to the oxime, which is amenable to Beckmann rearrangement.