On the Identity of Hofmann's “Dibenzyl-Phosphine” with Oxide of Tribenzyl-Phosphine, and on some other Points connected with the Phosphorised Derivations of Benzyl
- 1 January 1890
- journal article
- other
- Published by Cambridge University Press (CUP) in Proceedings of the Royal Society of Edinburgh
- Vol. 16, 193-200
- https://doi.org/10.1017/s0370164600006283
Abstract
In his well-known researches on the phosphines, Hofmann has shown (or believes that he has shown) that when an alkyl iodide (or other haloid derivative) is heated with phosphonium iodide and oxide of zinc, primary and secondary phosphines alone result; whereas, when an alcohol is heated with iodide of phosphonium, tertiary and quaternary phosphines are formed exclusively. Thus the two reactions are complementary to each other. Among the series to which he extended his investigations was that of benzyl, and in a paper published in the Berichte of the Berlin Chemical Society he describes the preparation of mono- and dibenzyl-phosphine, and gives their properties. Dibenzyl-phosphine he isolated as a crystalline substance perfectly tasteless and odourless, insoluble in ether, but soluble in alcohol. Its melting-point he found to be 205° C.Keywords
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