Quarterly Journal of the Chemical Society of London, Volume 1, Pages 1-996 |
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Results 1-3 of 71
Page 265
... protons ( or groups of protons ) in a B - cis- position ( a 1,3 - cis - arrangement ) , whereas deshielding actually occurs . Unfortunately the original error has been perpetuated.8 From the n.m.r. parameters of the compounds of known ...
... protons ( or groups of protons ) in a B - cis- position ( a 1,3 - cis - arrangement ) , whereas deshielding actually occurs . Unfortunately the original error has been perpetuated.8 From the n.m.r. parameters of the compounds of known ...
Page 342
... protons is that a more effective relaxation pathway exists between the geminal methylene protons themselves . Thus , the vinyl methyl group contributes little by comparison to their total relaxation , and irradiation of these protons ...
... protons is that a more effective relaxation pathway exists between the geminal methylene protons themselves . Thus , the vinyl methyl group contributes little by comparison to their total relaxation , and irradiation of these protons ...
Page 402
... protons ) , 3 · 75 ( 1H , d , shielded aromatic proton ) , 6.0 ( 1H , d , Jtrans - 10.10a 15 Hz , 10 - proton ) , 6 · 6 ( 1H , q , Jtrans - 10,10a 15 Hz , J10a.11 7.5 Hz , 10a - proton ) , ( 7 · 1 1H , q , J10a . 11 7.5 Hz , Jgem 15 Hz ...
... protons ) , 3 · 75 ( 1H , d , shielded aromatic proton ) , 6.0 ( 1H , d , Jtrans - 10.10a 15 Hz , 10 - proton ) , 6 · 6 ( 1H , q , Jtrans - 10,10a 15 Hz , J10a.11 7.5 Hz , 10a - proton ) , ( 7 · 1 1H , q , J10a . 11 7.5 Hz , Jgem 15 Hz ...
Contents
Organic chemistry | 1 |
oestrone | 10 |
Heterocyclic compounds from urea derivatives Part XVI Interaction of carbonohydrazide and carbodi | 19 |
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absorption acetic acid acetone added adduct alcohol alumina Amer aqueous aromatic band benzene boiled bromide Calc CH₂ chalcone Chem chim chloride chloroform chromatography cm.¹ colourless compound cooled crystallised cyclisation cyclohexane decomp derivatives diluted dimethyl dimethylformamide dioxan distilled doublet dried eluted ester ethanol ethyl acetate EtOH evaporated extracted with ether filtered filtrate Found fraction gave give heated under reflux hydrochloric acid hydrolysis i.r. spectrum identical irradiation isolated isomer ketone light petroleum b.p. lithium aluminium hydride mass spectra methylene mixed m.p. mixture mmoles mole n.m.r. spectrum needles nitrogen Nujol obtained olefin oxidation peak phosphine potassium prepared protons pyridine reaction reagent rearrangement reduced pressure reflux requires residue ring room temperature showed signals silica gel singlet sodium hydroxide solid solution solvent stirred structure synthesis Table tetrahydrofuran VIII yellow yield zygosporin