Journal of the Chemical Society, Part 3Chemical Society., 1949 |
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Results 1-3 of 37
Page 1764
... barium sulphate filtered off . The filtrate was boiled under reflux , and the reaction was followed polarimetrically : [ a ] D + 38 ° ( initial value ) ; + 49 ° ( 2 hours ) ; + 61 ° ( 5 hours ) ; + 74 ° ( 9 hours ) ; + 76 ° ( 10 hours ) ...
... barium sulphate filtered off . The filtrate was boiled under reflux , and the reaction was followed polarimetrically : [ a ] D + 38 ° ( initial value ) ; + 49 ° ( 2 hours ) ; + 61 ° ( 5 hours ) ; + 74 ° ( 9 hours ) ; + 76 ° ( 10 hours ) ...
Page 1924
... barium hydroxide . The barium sulphate was removed by filtration , and the filtrate evaporated to small bulk under reduced pressure . The resulting barium salts were separated by fractional crystallisation from aqueous alcohol , and the ...
... barium hydroxide . The barium sulphate was removed by filtration , and the filtrate evaporated to small bulk under reduced pressure . The resulting barium salts were separated by fractional crystallisation from aqueous alcohol , and the ...
Page 1925
... barium hydroxide , and barium cyclohexene - 3 - sulphonate was obtained as colourless hexagonal crystals ( Found : Ba , 28-65 % ) ( 1.2 g . ) , having the same properties and giving the same derivatives ( mixed m . p . ) as the salt ...
... barium hydroxide , and barium cyclohexene - 3 - sulphonate was obtained as colourless hexagonal crystals ( Found : Ba , 28-65 % ) ( 1.2 g . ) , having the same properties and giving the same derivatives ( mixed m . p . ) as the salt ...
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Common terms and phrases
acetic acid acetic anhydride acetone acetyl added admixture alkaline alkyl aluminium chloride Amer ammonia aqueous solution atoms barium benzene boiling bromine Calc carbinol carbon catalyst Chem Chim chloroform colourless needles compound concentrated condensation cooled crystals cyclohexene D.Sc decomp derivatives dilute dioxan dissolved distilled dithizone dried equiv ester ethanol ethyl acetate ethyl alcohol evaporated EXPERIMENTAL filtered filtrate formed Found fraction gave give heated under reflux hydrocarbon hydrochloric acid hydrogen chloride hydrolysis iodide ions isolated ketone Light absorption light petroleum b. p. method methyl mixed m. p. mixture molecule obtained oxide phenyl plates potassium hydroxide precipitated prepared pressure prisms pyridine Q-enzyme R₁ R₂ reaction reagent reduced removed requires residue room temperature salt semicarbazone separated sodium hydroxide solid soluble solvent specimen structure substance sulphate sulphone sulphuric acid synthesis Table unsaturated washed yield