Journal of the Chemical Society, Part 1The Society., 1947 |
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Page 24
... filtrate , after being concentrated under reduced pressure to 250 c.c. , con- tained 6-2 g . of pentose ( Hinton and ... filtrate by passage of hydrogen sulphide followed by aeration , and bromide ions were then completely removed by ...
... filtrate , after being concentrated under reduced pressure to 250 c.c. , con- tained 6-2 g . of pentose ( Hinton and ... filtrate by passage of hydrogen sulphide followed by aeration , and bromide ions were then completely removed by ...
Page 394
... filtrate was evaporated below 40 ° , and the residue dried over sulphuric acid in a vacuum and extracted with hot absolute alcohol ( 200 c.c. ) , leaving ammonium chloride undissolved . When the filtrate was cooled to 0 ° part of the ...
... filtrate was evaporated below 40 ° , and the residue dried over sulphuric acid in a vacuum and extracted with hot absolute alcohol ( 200 c.c. ) , leaving ammonium chloride undissolved . When the filtrate was cooled to 0 ° part of the ...
Page 609
... filtrate with thorough stirring until a faint permanent precipitate was formed , followed by addition of charcoal ( 10 g . ) . The filtrate was added to an equal volume of alcohol , and the solution made acid to litmus with concentrated ...
... filtrate with thorough stirring until a faint permanent precipitate was formed , followed by addition of charcoal ( 10 g . ) . The filtrate was added to an equal volume of alcohol , and the solution made acid to litmus with concentrated ...
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Common terms and phrases
acetic anhydride acetone acetyl added alkaline Amer amidine amine ammonia ammonium aqueous sodium atoms benzene boiling bromide Calc CH₂ charcoal Chem chloroform colourless needles compound concentrated hydrochloric acid condensation cooled crystallised crystallised from alcohol crystals cyanide decomp derivative diazotised dilute dissolved distilled dried ester ethyl acetate experimental extracted with ether filtered filtrate formed Found fraction gave give m. p. H₂O heated hydrochloric acid hydrogen chloride hydrolysis iodide isolated light petroleum m. p. and mixed methanol Methiodide method methyl alcohol minutes mixed m. p. molecular molecule nitration nitric acid obtained oxidation pale yellow petroleum b. p. phenyl picrate polymer polymerisation potassium precipitate prepared prisms pyridine reduced pressure refluxed removed requires residue room temperature salt separated sodium carbonate sodium hydroxide solid soluble solvent stirred structure substance sulphate sulphide sulphone sulphuric acid washed yellow needles yield