Practical Organic Chemistry for Advanced Students
by Cohen
Format: Paperback
ISBN13: 9781151796677
Paperback|9781151796677
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Overview
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...distilled in steam. The apparatus is shown in Fig. 63, p. 94. The flask containing the aniline is gently heated on the sand-bath, and steam is passed in from the tin bottle. It is advisable to heat the aniline mixture nearly to its boiling-point before steam is admitted, as otherwise a large quantity of water condenses in the flask. On distillation, aniline and water collect in the receiver, thermer as a colourless oil. When the distillate, as it comes over, appears clear instead of milky, the distillation is stopped. The oil is now extracted from the distillate by shaking up the liquid in a separating-funnel three times with small quantities (50 c.c.) of ether. The ethereal solution, separated as far as possible from water, is further dehydrated by adding a few pieces of solid caustic potash. The clear liquid is decanted into a distillingflask, the potash rinsed with a little more ether, and the ether distilled off on-the water-bath until nothing more passes over. The residue is then distilled over wire-gauze. Aniline distils at 181--182, and has usually a faint amber colour. Yield, about 30 grams. 2C6H5N02 + 3Sn + 12HCI = 2C6H6NH2 + 3SnCl4 + 4H20. Properties.--Colourless, highly refractive liquid, which soon darkens in colour; b.p. 182; sp. gr. ro265 at 15 Reactions.--: Add a drop of the oil to a solution of bleaching powder or sodium hypochlorite. An intense violet colouration is produced, which gradually fades. 2. Heat a drop of the oil with a few drops of chloroform, and about 1 c.c. of alcoholic potash, in the fume-cupboard. Phenyl carbamine is formed, which possesses an intolerable smell. (Hofmann's reaction for primary amines). 3. Add to a drop of aniline in a basin a few drops of concentrated sulphuric acid, and stir with a...
| ISBN-13 | 9781151796677 |
|---|---|
| ISBN-10 | 1151796670 |
| Weight | 0.55 Pounds |
| Dimensions | 9.00 x 6.00 x 0.37 In |
| List Price | $19.99 |
| Format | Paperback |
|---|---|
| Pages | 162 pages |
| Publisher | |
| Published On | 2009-12-01 |
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