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Methods of preparing isomerically pure alkyl chlorides are known and described in the literature. S. R. Sandler, J. Org. Chem. 35, 3967 (1970), describes the conversion of primary, secondary and tertiary alcohols into alkyl chloride compounds by reacting the alcohols with an excess of cyanuric chloride under anhydrous conditions. Furthermore, on page 3968 of the text, the reaction of 2-pentanol with cyanuric chloride, zinc chloride/hydrogen chloride, thionyl chloride/pyridine and with hydrogen chloride is described. Isomerically pure 2-chloro-pentane is obtained in a yield of 48% in the reaction with thionyl chloride/pyridine and in a yield of 57% in the reaction with cyanuric chloride alone.