Quarterly Journal of the Chemical Society of London |
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Page 626
... precipitated by the slow addition of acetone ( 5 1. ) . The precipitate , isolichenin A , was collected in a centrifuge , washed with acetone and alcohol , and hardened by grinding under ether ( dry wt . , 195 g . ) . The crude ...
... precipitated by the slow addition of acetone ( 5 1. ) . The precipitate , isolichenin A , was collected in a centrifuge , washed with acetone and alcohol , and hardened by grinding under ether ( dry wt . , 195 g . ) . The crude ...
Page 932
... precipitate . The precipitates were too unstable to be recrystallized without decomposition . The amine and the borate contents , determined by titration ( see Table 1 ) , demonstrate that they are 1 : 1 addition 3 H2Ç H2C - O B - OBun ...
... precipitate . The precipitates were too unstable to be recrystallized without decomposition . The amine and the borate contents , determined by titration ( see Table 1 ) , demonstrate that they are 1 : 1 addition 3 H2Ç H2C - O B - OBun ...
Page 1102
... precipitate . After 2 hr . the precipitate was filtered off , washed , and dried ( 0-07 g . ) . Crystal- lisation from aqueous acetic acid gave yellow needles of quinoline - 2 - aldehyde 2,4 - dinitrophenyl- hydrazone , m . p . and ...
... precipitate . After 2 hr . the precipitate was filtered off , washed , and dried ( 0-07 g . ) . Crystal- lisation from aqueous acetic acid gave yellow needles of quinoline - 2 - aldehyde 2,4 - dinitrophenyl- hydrazone , m . p . and ...
Contents
No PAGE | 7 |
The reaction of molybdenum v chloride with some aliphatic amines | 24 |
NO PAGE | 29 |
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Common terms and phrases
absorption acetic acid acetone added alcohol alkaline alkyl Amer amine anhydride aromatic ation atom band benzene bond bromide Calc carbonyl CH₂ Chem chloride chloroform chromatography cm.¹ column complex compounds concentration constant crystallised cyclic decomp derivatives dilute dioxan disaccharide distilled dried elution equiv ester ethanol ethyl acetate evaporated EXPERIMENTAL extracted with ether filtered formation formed Found fraction frequencies gave give H₂O heated hydrochloric acid hydrolysis hydroxyl infrared infrared spectra iodide isolated isomers ketone lactone light petroleum b. p. limonin lithium aluminium hydride m. p. and mixed methyl mixed m. p. mixture mole molecules needles nitrogen obtained oxidation perchlorate phenol phosphate pipecolic acid potassium precipitate prepared prisms protons pyridine reaction reduced refluxed requires residue room temperature salt sodium hydroxide solid solution solvent spectrum structure substituted sulphuric acid Table ultraviolet values washed yield