Journal of the Chemical Society, Part 2Chemical Society., 1949 |
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Page 1282
... crystals were filtered off , washed well with dry ether until free from pyridine and bromofluoroethane , and then dried in a vacuum . The pyridinium bromide ( Found : N , 6-56 ; Br , 37.9 . C , H , NBrF requires N , 6.79 ; Br , 38.9 ...
... crystals were filtered off , washed well with dry ether until free from pyridine and bromofluoroethane , and then dried in a vacuum . The pyridinium bromide ( Found : N , 6-56 ; Br , 37.9 . C , H , NBrF requires N , 6.79 ; Br , 38.9 ...
Page 1284
... crystals present a similar problem to that of the oxy - acids . For example , in molecular crystals containing CO and NH groups the structural principles are comparatively simple if the molecule contains equal numbers of these groups ...
... crystals present a similar problem to that of the oxy - acids . For example , in molecular crystals containing CO and NH groups the structural principles are comparatively simple if the molecule contains equal numbers of these groups ...
Page 1589
... crystals which , after cooling , was filtered off and washed with a little ice - cold acetone , followed by acetone- cyclohexene ( 1 : 1 ) and finally light petroleum . The white crystals had the melting point of the pure substance ...
... crystals which , after cooling , was filtered off and washed with a little ice - cold acetone , followed by acetone- cyclohexene ( 1 : 1 ) and finally light petroleum . The white crystals had the melting point of the pure substance ...
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Common terms and phrases
4-dinitrophenylhydrazone absorption acetic anhydride acetone acetyl acidified added aldehyde alkaline aluminium chloride Amer amine ammonia aniline aqueous sodium atom benzene boiling bond bromine Calc carbon catalyst CHâ‚‚ Chem chloroform citrinin colourless needles compound condensation cooled crystallised crystallised from alcohol crystals cyanide cyclisation decomp derivative dilute dissolved distilled dried electrode ester evaporated extracted with ether filtered filtrate formed colourless Found fraction gave give heated under reflux hydrochloric acid hydrogen chloride hydrolysis iodide isolated ketone lactone light petroleum b. p. m. p. and mixed methanol method methyl alcohol minutes mixed m. p. mixture molecule obtained oxide phenol phosphoric picrate potassium hydroxide precipitate prepared pyridine reaction reduced pressure requires residue resin room temperature salt separated sodium hydroxide solid soluble solution solvent specimen structure substance sulphuric acid triethylamine values washed yellow needles yield