Organic 2 Review Problem 402

Organic 2 Review Problem 402 - 386 PRACTICAL ORGANIC...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
386 PRACTICAL ORGANIC CHEMISTRY few minutes. Pour into cold water and note the separation of solid m-dinitro benzene, m.p. 90°. SPECIAL TEST FOR ;w-DIMTROBENZENE. Acetone-Alkali coloration. Dissolve a few crystals in 1-2 ml. of acetone and add a few drops of aqueous XaOII solution. A deep violet coloration is pro- duced, and is turned red by acetic acid but destroyed by mineral acids (see Test 4(6) for Ketones, p.-346, and also Test 2(0) p. 274). (B) NITROPHENOLS. Physical Properties. Both solids, freely soluble in hot water, sparingly in cold water. o-Nitrophenol, bright yellow, volatile in steam,* odour resembling both that of phenol and of nitrobenzene: p -nitrophenol, colourless when pure, non-volatile in steam, odourless. GENERAL REACTIONS. 1. Soluble in aqueous NaOH solution, giving yellow or red solutions. 2. Sufficiently strongly acidic to liberate CO 2 from Na 2 CO 3 solution. 3. Reduced to primary aminophenols. 4. Some nitrophenols give colorations with ferric chloride.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online