Quarterly Journal of the Chemical Society of London, Part 3 |
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Page 2507
... eluted gummy fractions ( total 100 mg . ) which gave a positive test with tetranitro- methane . Elution with mixtures of benzene and light petroleum afforded small quantities of amorphous fractions ( total 8 mg . ) . Finally , benzene ...
... eluted gummy fractions ( total 100 mg . ) which gave a positive test with tetranitro- methane . Elution with mixtures of benzene and light petroleum afforded small quantities of amorphous fractions ( total 8 mg . ) . Finally , benzene ...
Page 2508
... eluted with benzene ( 800 ml . ) remained unidentified . Ether ( 700 ml . ) eluted a product ( 80 mg . ) which on crystallisation from acetone gave cortisone acetate , m . p . and mixed m . p . 240—242 ° , [ α ] + 220 ° ( c 0 · 82 ) ...
... eluted with benzene ( 800 ml . ) remained unidentified . Ether ( 700 ml . ) eluted a product ( 80 mg . ) which on crystallisation from acetone gave cortisone acetate , m . p . and mixed m . p . 240—242 ° , [ α ] + 220 ° ( c 0 · 82 ) ...
Page 2793
... Elution with pentane gave material ( 43 mg . ) which after repeated recrystallisation from acetone gave cholesteryl ... eluted with more powerful eluants , but only small quantities of uncrystallisable oils were obtained . A 1 : 1 ...
... Elution with pentane gave material ( 43 mg . ) which after repeated recrystallisation from acetone gave cholesteryl ... eluted with more powerful eluants , but only small quantities of uncrystallisable oils were obtained . A 1 : 1 ...
Contents
ABEL E W Bennett M A and Wilkinson G | 2323 |
Bourne E J Hartigan J and Weigel H | 2332 |
Clark E R | 2344 |
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1,3,5-trinitrobenzene absorption acetic acid acetic anhydride acetone added alcohol alkaline alkyl Amer amine ammonia anhydride atom benzene boiling bond bromide Calc carbon Chem chloride chloroform chromatography complex compound concentration constant cooled crystallised crystals curve decomp derivatives diethylamine dilute dimer dioxan dioxide dissolved distilled dried eluted ester ethanol evaporated filtered filtrate formation formed Found fraction gave give glycollic acid glyoxylic acid heated hydride hydrochloric acid hydrolysis hydroxide infrared infrared spectrum iodide isolated isomer K₁ light petroleum b. p. lithium lithium aluminium hydride m. p. and mixed methyl methyl iodide mixed m. p. mixture mole molecular molecule nitrogen obtained oxidation oxygen perchlorate picrate polymer potassium precipitate prepared prisms pyridine reaction reduced refluxed requires residue room temperature salt sodium hydroxide solid solvent spectra stirred structure sulphuric acid Table titration ultraviolet values washed yield