HEAT OF ZIRCONIUM HALIDE INTERACTIONS WITH ETHERS

The heats of formation of molecular zirconium chloride and bromide 1: 1 and 1: 2 compounds with ethyl formate, ethyl acetate, and ethyl butyrate were determined, as well as the heat of zirconium iodide dissolution in ethylacetate. The attachment heat of the first ether molecule exceeds by several fold the heat required for the annexation of the second molecule. The experiments indicated no regular reduction in the heat of interaction for the zirconium bromide-- chloride- - iodide series with complex ethers. (R.V.J.)