Liquid-solid Phase Diagram of (+) and (−) 5-Decanolide

Abstract

To determine the liquid-solid T_x-diagram of optically active 5-decanolide (δ-decalactone) the melting curves of (+) and (−) 5-decanolide¹ were measured from −60° to 0° C by means of differential thermal analysis², the rate of heating up being 2.14° C/min (Fig. 1). The accuracy of the melting points found was within 0.5° C. The samples were prepared by starting from the (+) and (−) components to which (±) 5-decanolide was added.