Color of butyllithium reaction
Thread Content
Recently, butyllithium products using cyclohexane as a protecting solvent have shown a reddish-brown color in the solution before filtration during the reaction process； But when n-hexane is used as the protecting solvent, it turns milky white (the normal color). The lithium metal and chlorobutane of the same batch were processed under identical conditions, with argon used as the shielding gas; the reaction vessel was also connected to a nitrogen pipeline (which was not activated during the reaction). The reaction control temperature differs between n-hexane and cyclohexane (determined by the process). May I ask the experts, what is the reason?
Yesterday, n-hexane was used as the protective solvent, and the color was normal. Is it a problem with the protective solvent? Does cyclohexane react with nitrogen?