Journal of the Chemical SocietyThe Society., 1964 "Titles of chemical papers in British and foreign journals" included in Quarterly journal, v. 1-12. |
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Page 377
... chromatography in propan - 2 - ol - ammonia ( d 0.88 ) -water ( 70 : 6 : 30 ) and examined for the presence of urea , 14 none could be detected . The method was capable of detecting < 0.5 % of the total urea which could be liberated ...
... chromatography in propan - 2 - ol - ammonia ( d 0.88 ) -water ( 70 : 6 : 30 ) and examined for the presence of urea , 14 none could be detected . The method was capable of detecting < 0.5 % of the total urea which could be liberated ...
Page 1111
... chromatography . The only compounds found were the diaryl ether , unchanged halide , and the by - products shown . Constituents of the solution were commonly accounted for to the extent of 95 % . 1 - Phenoxynaphthalene was alternatively ...
... chromatography . The only compounds found were the diaryl ether , unchanged halide , and the by - products shown . Constituents of the solution were commonly accounted for to the extent of 95 % . 1 - Phenoxynaphthalene was alternatively ...
Page 1190
... chromatography . Oxidation of norbornadiene with peracetimidic acid . 30 % Hydrogen peroxide ( 85 ml . , 0.75 mol ) was added during 15 min . to a stirred suspension of potassium hydrogen carbonate ( 20 g . ) in acetonitrile ( 32.5 g ...
... chromatography . Oxidation of norbornadiene with peracetimidic acid . 30 % Hydrogen peroxide ( 85 ml . , 0.75 mol ) was added during 15 min . to a stirred suspension of potassium hydrogen carbonate ( 20 g . ) in acetonitrile ( 32.5 g ...
Contents
NO PAGE | 1 |
Nucleophilic reactivity Part IV Competing bimolecular substitution | 5 |
The biosynthesis of fungal metabolites Part I Two different pathways | 16 |
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absorption acetic acid alkaline aluminium chloride Amer amine anhydride aphins aqueous aromatic atoms band benzene bond bromide Calc carbon Chem chloride chloroform chromatography cm.¹ complex compound concentration coupling constants crystallised crystals decomp decomposition derivatives diazomethane dilute dimethyl dimethyl ether dioxan dried Elution equation erythroaphin-fb erythroaphins ester ethanol ether ethyl ethyl acetate evaporated EXPERIMENTAL extracted formation Found fraction gave halides hydrochloric acid hydrogen hydrogen chloride hydrolysis infrared infrared spectra iodide irradiated isomer k₂ ligand light petroleum m. p. and mixed maltose mixed m. p. mixture mole molecule mµ log ɛ nitrogen obtained oxidation oxygen phenyl piperidine potassium precipitate prepared protoaphin proton pyridine quinone reaction recrystallised refluxed requires residue room temperature sample similar sodium hydroxide soluble solution solvent spectrum structure substitution Table ultraviolet values washed yellow yield