Tertiary alcohols react immediately with Lucas reagent as evidenced by turbidity owing to the low solubility of the organic chloride in the aqueous mixture.
The solution turns turbid and forms an oily layer in three to five minutes (varies based on the solubility). The remaining carbonium ion then combines with the chloride ion to form an alkyl halide.
ROH + HCl → RCl + H 2 O. Lucas Test Lucas test is used to differentiate and categorize primary, secondary and tertiary alcohols using a solution of anhydrous zinc chloride in concentrated hydrochloric acid. In this method, the alcohol is treated with Lucas reagent (a mixture of conc.
The solution turns turbid and forms an oily layer immediately. © 1997-2020 LUMITOS AG, All rights reserved, https://www.chemeurope.com/en/encyclopedia/Lucas%27_reagent.html, Your browser is not current. The Lucas test in alcohols is a test to differentiate between primary, secondary, and tertiary alcohols. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article.