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PROPIOLIC ACID

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Originally appearing in Volume V22, Page 449 of the 1911 Encyclopedia Britannica.

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PROPIOLIC See also:

ACID (from the Lat. root ac-, sharp; acere, to be sour)

ACID , CH:C•See also:

CO2H

CO2H, See also:

ACETYLENE

acetylene mono-carboxylic acid, an unsaturated organic acid prepared by boiling acetylene dicarboxylic acid (obtained by the See also:

ACTION

action of alcoholic potash on dibromsuccinic acid) or its acid See also:

POTASSIUM [symbol K (from kalium), atomic weight 39.114 0=16)]

potassium See also:

salt with See also:

WATER

water (E. v. Bandrowski, Ber., 188o, 13, p. 2340). It forms silky crystals which melt at 6° C., and See also:

BOIL

boil at about 144° C. with decomposition. It is soluble in water and possesses an odour resembling that of acetic acid. Exposure to sunlight converts it into trimesic acid (See also:

BENZENE, C6H6

benzene-1.3.5-tricarboxylic acid). See also:

BROMINE (symbol Br, atomic weight 79-96)

Bromine converts it into dibromacrylic acid, and it gives with hydrochloric acid 0-chloracrylic acid. It forms a characteristic explosive See also:

SILVER

silver salt on the addition of ammoniacal silver nitrate to its aqueous See also:

SOLUTION (from Lat. solvere, to loosen, dissolve)

solution, and an amorphous precipitate which explodes on warming with ammoniacal cuprous chloride. Its See also:

ETHYL

ethyl ester condenses with See also:

HYDRAZINE (DIAMIDOGEN), N2H4

hydrazine to See also:

FORM (Lat. forma)

form pyrazolone (R: v. Rothenburg, Ber., 1893, 26, p. 1722). Phenylpropiolic acid, C6H5C:C•CO2H, formed by the action of alcoholic potash on cinnamic acid dibromide, C6H5CHBr•CHBr•CO2H, crystallizes in See also:

long needles or prisms which melt at 136–1370 C.

When heated with water to I2o° C. it yields phenyl acetylene See also:

C6H5

C6H5•C;CH. Chromic acid oxidizes it to benzoic acid; See also:

ZINC

zinc and acetic acid reduce it to cinnamic acid, C6H5•CH:CH•CO2H, whilst See also:

SODIUM [symbol Na, from Lat. natrium; atomic weight 23.00 (0=16)]

sodium See also:

AMALGAM

amalgam reduces it to hydrocinnamic acid, C6H5•See also:

CH2•CO2H. Ortho-nitrophenylpropiolic acid, NO2•See also:

C6H4•C: C•CO2H, prepared by the action of alcoholic potash on ortho-nitrocinnamic acid dibromide (A. v. See also:

BAEYER, JOHANN FRIEDRICH WILHELM ADOLF VON (1835– )

Baeyer, Ber., 188o, 13, p. 2258), crystallizes in needles which decompose when heated to 155–156° C. It is readily converted into See also:

INDIGO (earlier indico, from Lat. indicum, the Indian sub-stance or dye; the Sans. name was niti, from nila, dark blue, and this through Arab. al-nil, annil, gives " aniline ")

indigo (q.v.).

End of Article: PROPIOLIC ACID

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PROPYL ALCOHOLS (C3H7OH)