The following five new compounds have been synthesized and characterized: cis-1, 2, 3- trichloro-2-butene, trans-1, 2, 3-trichloro-2-butene, cis-2, 3-dichloro-2-buten-l-ol, trans-2, 3- dichloro-2-buten-l-ol and 2, 3, 3-trichloro-l-butene. The relative reactivities of cis-and trans-1, 2, 3-trichloro-2-butene and 2, 3, 3-trichloro-l-butene have been determined for their reaction with potassium iodide in acetone, and with sodium ethoxide in ethanol. Also the relative ...