Previous investigations by Pflaum and Wenzke'and Wilson and Wenzke2 have shown that there is a considerable reduction in the carbon to halogen moment when the halogen is directly attached to an acetylenic carbon atom. The latter investigators have shown that this reduction of moment is sufficiently great in the aryliodoacetylenes to cause a reversal of direction of moment in the carbon to iodine linkage. In the alkyl iodides the negative end of ...
