Two common qualitative tests for unsaturation are the reaction of the compounds with bromine in carbon tetrachloride and with potassium permanganate. In both cases a positive test is denoted by decolorization of the reagent.wo common qualitative tests for unsaturation are the reaction of the compounds with bromine in carbon tetrachloride and with potassium permanganate. In both cases a positive test is denoted by decolorization of the reagent.
On this day in 1917, the text of the so-called Zimmermann Telegram, a message from the German foreign secretary, Arthur Zimmermann, to the German ambassador to Mexico proposing a Mexican-German alliance in the case of war between the United States and Germany, is published on the front pages of newspapers across America.
In February the British gave the American ambassador in London a copy of an intercepted German telegram. The telegram came from the German Foreign Secretary, Arthur Zimmerman, to the German ambassador to Mexico. Zimmerman proposed that in the event of war with the US, Germany and Mexico would join in an alliance. Germany would fund Mexico's conflict with the US. With victory achieved, Mexico would regain her lost territories of Arizona, Texas and New Mexico.