The Preparation and Properties of Substituted Diphenic Anhydrides and DipheneinsUniversity of Wisconsin--Madison, 1924 - 42 pages |
Common terms and phrases
2-7 dihydroxy diphenic 2-7 dinitro diphenic 2-7 N-diacetyl diamino 30 grams 4-5 diamino diphenic acetic acid acetic anhydride acid crystallized Adkins Jr alcohol alkali solution alkali to give amino acid amino groups anhydride and resorcinol anhydride with resorcinol beaker Bischoff and Adkins bromine carboxylic acid Chem chloride chromium salts concentrated sulfuric acid condensation product condensed with resorcinol COOH COOH diamino diphenic acid diamino diphenic anhydride dihydroxy diphenic acid dilute alkali dinitro acid dinitro diphenic acid diphenamic diphenic acid hydrochloride dried at 125 evaporating dish fluorescence fluorescense free from chromium grams potassium bichromate heated hour hydro hydrochloric acid isomer melting point N-diacetyl diamino diphenein N-diacetyl diamino diphenic NH₂ nitrogen NO₂ OOCCH3 phenanthrene phthalic anhydride red precipitate reflux condenser silk and wool sodium hydroxide soluble in dilute SUBSTITUTED DIPHENIC ANHYDRIDES suction sulfuric acid temperature theoretical uncorr University of Wisconsin washed free water of crystallization white crystals yellow zinc zinc chloride
Popular passages
Page 10 - ... and insecticides, and in the textile industry as an assist in printing. All water- and acid-soluble compounds of arsenic are poisonous. Arsenious acid, arsenic trioxide, arsenious oxide, arsenious anhydride, or white arsenic, As2O3, is an anhydride which, dissolved in water, reacts as H3AsO3. It is only slightly soluble in cold water but more soluble in hot water, alkalies, alkaline carbonates, alcohol and some dilute acids. It occurs naturally in mineral form and is also recovered from arsenical...
Page 8 - Upon cooling the mixture was diluted with an equal volume of water and the...
Page 12 - ... hour. 80 cc. of N hydrochloric acid solution were added on cooling and the precipitate filtered off and washed with water. The yield was 19 g. Recrystallized as in the preceding examples, the acid melts with decomposition at 213-3.5° when rapidly heated. It is rather sparingly soluble in boiling water or 50% alcohol, separating from the former as rosets of delicate needles. Subs., 0.1460: 16.1 cc. N (23.5°, 750 mm.). Subs., 0.3273...