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 355
... Absorption Spectra . - The absorption spectrum of diazomethane in solution in the wave- length region 3000-5000 Å shows four maxima . On change of the solvent in the sequence ,日 IV Absorbance I 400 450 Wavelength ( mu ) FIG . 1 ...
... Absorption Spectra . - The absorption spectrum of diazomethane in solution in the wave- length region 3000-5000 Å shows four maxima . On change of the solvent in the sequence ,日 IV Absorbance I 400 450 Wavelength ( mu ) FIG . 1 ...
Page 773
... absorption of some of the compounds described in this paper.2 B - Alkylbutenolactones of type ( IV ; R1 = Alkyl , R2 = R3 = H ) absorb strongly 39 at 217 mu . Absorption in the lactones bearing a - substituents is related to the ...
... absorption of some of the compounds described in this paper.2 B - Alkylbutenolactones of type ( IV ; R1 = Alkyl , R2 = R3 = H ) absorb strongly 39 at 217 mu . Absorption in the lactones bearing a - substituents is related to the ...
Page 854
... absorption maxima rapidly on addition of dilute mineral acid , and a solution in glacial acetic acid lost 18 % of its initial absorption intensity during 68 hr . at room temperature . The dark solutions obtained showed no selective ...
... absorption maxima rapidly on addition of dilute mineral acid , and a solution in glacial acetic acid lost 18 % of its initial absorption intensity during 68 hr . at room temperature . The dark solutions obtained showed no selective ...
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