Organic 2 Review Problem 346

Organic 2 Review Problem 346 - several minutes, cool, add a...

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

View Full Document Right Arrow Icon
330 PRACTICAL ORGANIC CHEMISTRY Substance Aniline hydrochloride C 6 H 5 NH 2 ,HC1 Ethyl benzoate C 6 H 5 COOC 3 H 6 Class Salts of aromatic amines Esters of aromatic acids* Acetaldehyde CH 3 CHO (aqueous solution) Benzaldehyde C 8 H 6 CHO Aliphatic alde- hydes (not given by formaldehyde) Aromatic alde- hydes* Chloral hydrate CCl 3 CH(OH) 2 Glucose C 6 H 12 O 6 Certain carbo- hydrates Result Aniline is liberated in the cold and floats on the surface. Hydrolyses to ethanol and acid on being heated for a few minutes. Cool, add a few ml. of water and then cone. HCl, and cool again. Crystals of benzoic acid separate out. Complete hydrolysis can- not be carried out effec- tively on a test-tube scale, (see p. 355). On heating gives a yellow resin having a character- istic colour. Undergoes Cannizzaro's reaction, giving benzyl al- cohol and benzoic acid (p. 229). Warm gently for
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: several minutes, cool, add a few ml. of water and then cone. HCl, and cool again. Crystals of benzoic acid separate out on scratching the sides of the tube with a glass rod. The Cannizzaro reaction cannot be carried out very satisfactory on a test-tube scale. On gentle warming gives chloroform, which separ-ates out as oily liquid, characteristic odour. Turns-brown on heating. Section 5. Treatment with Sodium Carbonate solution. Place about 5 ml. of Na 2 CO 3 solution in (p. 318) a test-tube, add a few fragments of unglazed porcelain, and boil gently to ensure complete absence of bicarbonate and of free carbon dioxide. Cool the solution, add about o-i g. of the substance to be tested, and * See footnote p. 329....
View Full Document

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.

Ask a homework question - tutors are online