Organic 2 Review Problem 202

Organic 2 Review Problem 202 - 186 P RACTICAL O RGANIC C...

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186 PRACTICAL ORGANIC CHEMISTRY becomes trivalent by the addition of chlorine, and iodobenzene dichloride is formed. The latter can be regarded as a salt of the basic iodosobenzene, which can be readily obtained by treating the dichloride with sodium hydroxide. C 6 H 5 ICl 1 -f 2NaOH = C 6 H 8 IO + 2NaCl + H 4 O Iodosobenzene forms similar salts with other acids; dilute nitric acid gives the dinitrate, C 6 H 5 I(NO 3 ) 2 , and acetic acid the diacetate, C 6 H 5 I(OOCCH 3 ) 2 . When iodosobenzene is boiled with water, interaction occurs with the formation of one equivalent of iodobenzene and one of iodoxybenzene: 2C 4 H 1 IO = C,H 6 I + C 6 H 6 IO, the iodobenzene steam-distils off, whilst the iodoxy-benzene dissolves in the hot water and rapidly crystallises on cooling. IODOBENZENE-DICHLORIDE. If a cylinder of chlorine is not available for this preparation, generate the chlorine by allowing concentrated hydrochloric acid to fall from a dropping-funnel which is fitted into the neck of a Buchner flask containing coarsely powdered potassium
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This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.

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