Coordination Problems of Nitrogen-Iodine-Compounds in Liquid Ammonia
By the reaction of iodine and small amounts of liquid ammonia at 75° a black brown solid is formed. A tensimetric deammonation shows that this solid is an addition compound of iodine and ammonia with 2 moles of ammonia per mole of iodine. Further deammonation effects formation of a com — pound I2. NH3; finally, I2 remains. Ammonolysis of iodine takes place only to a small extent. These brown addition compounds of iodine correspond to the well known brown addition compounds of iodine and ether, alcohol, pyridine or liquid hydrogen sulfide respectively and are looked upon as charge transfer complexes with iodine as electron acceptor and the solvents as electron donors. This view was proved by the measurement of the charge transfer band of iodine-ammonia in heptane at 229 mµ (2).
KeywordsCharge Transfer Band Liquid Ammonia Addition Compound Complex Formation Reaction Black Substance
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