Halogeno-1,4-dioxans and their derivatives. Part VI. 4,4′,5,5′-Tetrachlorobi-1,3-dioxolan-2-yl

Abstract

From the product of interaction of trans-2,3-dichloro-1,4-dioxan and concentrated sulphuric acid a compound has been isolated which is homogeneous on t.l.c. Mass, n.m.r., i.r., and Raman spectroscopy show that this is 4,4′,5,5′-tetrachlorobi-1,3-dioxolan-2-yl with the two chlorine atoms in each ring trans, but no decision is possible as to whether it is the racemate or the meso-compound. A possible mechanism of formation is indicated.