Online Encyclopedia

GLYPTOTHEK (from Gr. y?tnrros, carved...

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Originally appearing in Volume V12, Page 148 of the 1911 Encyclopedia Britannica.
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GLYPTOTHEK (from Gr. y?tnrros, carved, and OiiKf, a place of storage), an architectural term given to a gallery for the exhibition of sculpture, and first employed at Munich, where it was built to exhibit the sculptures from the temple of Aegina. hydes, thus: 3 (CH 2) 2C H • C HO +KHO = (CH 3)2CHCO2K + (CH,)2CH•CH(OH)•CH(OH)•CH(CH,)2. The tertiary glycols are known as pinacones and are formed on the reduction of ketones with sodium amalgam. The glycols are somewhat thick liquids, of high boiling point, the pinacones only being crystalline solids; they are readily soluble in water and alcohol, but are insoluble in ether. By the action of dehydrating agents they are converted into aldehydes or ketones. In their general behaviour towards oxidizing agents the primary glycols behave very similarly to . the ordinary primary alcohols (q.v.), but the secondary and tertiary glycols break down, yielding compounds with a smaller carbon content. Ethylene glycol, C2H4(OH)2, was first prepared by A. Wurtz (Ann. chim., 1859 [31, 55, p. 400) from ethylene dibromide and silver acetate. It is a somewhat pleasant smelling liquid, boiling at 197° to 197.5° C., and having a specific gravity of 1.125 (0°). On fusion with solid potash at 250° C. it completely decomposes, giving potassium oxalate and hydrogen,
End of Article: GLYPTOTHEK (from Gr. y?tnrros, carved, and OiiKf, a place of storage)
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