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A Manual of the Chemistry of the Carbon Compounds

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TEE CARBON COMPOUNDS. 153<br />

a red-hot tube, and fur<strong>the</strong>r, by <strong>the</strong> destructive distillation <strong>of</strong> sugar,<br />

tartaric acid, wood, &c, and is <strong>the</strong>refore contained in crude woodspirit.<br />

Acetone is a mobile liquid, boiling at 56°, and having a pleasant<br />

smelL It is iniscible with water, and combines, like <strong>the</strong> aldehydes,<br />

with <strong>the</strong> acid sulphites <strong>of</strong> <strong>the</strong> alkali-metals, forming crystalline compounds,<br />

which are but sparingly soluble in water.<br />

By <strong>the</strong> action <strong>of</strong> acids on acetone it loses <strong>the</strong> elements <strong>of</strong> water,<br />

and yields products <strong>of</strong> condensation.<br />

MetAyl-isoJmtenyl Xetone CyEri0O, commonly called mesilyl oxide,<br />

is obtained by gradually adding strong sulphuric acid to acetone, or if<br />

acetone is left standing over quicklime for some time, and afterwards<br />

distilled. It is a colourless oil, smelling like peppermint, and boiling<br />

at 130°. It has <strong>the</strong> following constitution:—<br />

CHS<br />

)>C=CH—CO—CH8<br />

CHS<br />

Besides this substance ano<strong>the</strong>r compound, called acetophwom<br />

C9H.4O, is formed by <strong>the</strong> above reaction. It forms yellowish crystals,<br />

melting at 28°, and boiling at 196°. Its constitution is probably <strong>the</strong><br />

following ;—<br />

CH8-~C=CH—C=CH—CO—CH8<br />

CH8<br />

CHS<br />

"When acetone is heated with concentrated sulphuric acid, mesitylene<br />

CBHM is obtained:—<br />

3C8HaO = C ^ + 3H8O<br />

This hydrocarbon belongs to <strong>the</strong> he gr group <strong>of</strong> aromatic compounds, and<br />

is trimethylbenzene :—<br />

h<br />

CH8<br />

CH3—-0 C—

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