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3. On the Action of the Chlorides of Iodine upon Acetylene and Ethylene
Published online by Cambridge University Press: 15 September 2014
Extract
Before giving the action of ethylene on the chlorides of iodine. I may shortly describe the method of preparing the latter, which I found to be the most advantageous:—
A weighed quantity of perfectly dry iodine being introduced into bulb A of flask 1, perfectly dry chlorine gas is passed over it, A being at the same time heated over a water-bath to about 60° to 80° C. The ICl3, as it is formed, volatilises and condenses almost entirely in B, only a small portion escaping into flask 2. Chlorine is passed until no more iodine remains in bulb A. If the heating be omitted, only the outermost layers of iodine are converted into the trichloride, a kernel remaining unacted on. (Compare Christomanos, Berl. Ber. X. No. 5, p. 434.)
- Type
- Proceedings 1877-78
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- Copyright © Royal Society of Edinburgh 1878
References
page 589 note * It is generally stated that ICl dissolves in alcohol and ether, forming yellow solution. (See Watts's Dict. of Chem. vol. iii. p. 293, new ed.) The fact is, that if ether (perfectly free from water and alcohol) be dropped into ICl, a most violent reaction ensues. If, on the other hand, ICl be dropped into a large excess of ether (or alcohol) at 0°, it dissolves, at first forming a pale yellow-brown solution; but, in the course of a few minutes, the ether becomes darker and darker from separation of iodine. The chlorine probably acts on the ether to form dichlor-ether (C4H8Cl2O) for the most part. This requires to be investigated.
page 592 note * It seemed to boil at first, on heating very rapidly, between 180° and 190° C., but this is not reliable.