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ALDEHYDES

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Originally appearing in Volume V01, Page 531 of the 1911 Encyclopedia Britannica.
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ALDEHYDES , a class of chemical compounds of the See also:

general See also:formula R•CHO (R = an alkyl or an aryl See also:group). The name is derived from See also:alcohol dehydrogenatum in allusion to the fact that they may be prepared by the oxidation of See also:alcohols. The See also:lower members of the See also:series are neutral liquids possessing a characteristic See also:smell; they are soluble in See also:water and are readily volatile (formaldehyde, however, is a See also:gas at See also:ordinary temperatures). As the See also:carbon content of the See also:molecule increases; they become less soluble in water, and their smell becomes less marked with the increase in boiling point, the highest members of the series being odourless solids, which can only be distilled without decomposition in vacuo, CRRI CRR' [ --> 0< CH•COOC2H6 CH.000H See also:CO2+CHRR'•CHO.

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