Quarterly Journal of the Chemical Society of London, Volume 1 |
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Page 30
... methyl group doublet signals ( observed in pentachloroethane solution at 68 ° ; see Figure 5 , A ) to the eight isopropyl- methyl groups of the conformations ( VII and VIIa ) and ( VIII and VIIIa ) . At this temperature ( 68 ° ) , the ...
... methyl group doublet signals ( observed in pentachloroethane solution at 68 ° ; see Figure 5 , A ) to the eight isopropyl- methyl groups of the conformations ( VII and VIIa ) and ( VIII and VIIIa ) . At this temperature ( 68 ° ) , the ...
Page 292
... methyl group is directly bonded to the carbonyl group of the a - keto - ester , as methyl laevulinate and methyl pyruvate remained unaltered when electrolysed in methanol . It can also be seen ( Table ) that the reduc- tion is much ...
... methyl group is directly bonded to the carbonyl group of the a - keto - ester , as methyl laevulinate and methyl pyruvate remained unaltered when electrolysed in methanol . It can also be seen ( Table ) that the reduc- tion is much ...
Page 333
... methyl group . On the introduction of a 2 - methyl group , which should be pre- dominantly equatorial , C ( 2 ) experiences a shift of -5-3 p.p.m. ( cf. cyclohexane , -5.6 p.p.m. ) . The The effect on C ( 4 , 6 ) is negligible ( +0.4 ...
... methyl group . On the introduction of a 2 - methyl group , which should be pre- dominantly equatorial , C ( 2 ) experiences a shift of -5-3 p.p.m. ( cf. cyclohexane , -5.6 p.p.m. ) . The The effect on C ( 4 , 6 ) is negligible ( +0.4 ...
Contents
Physical organic chemistry | 1 |
Topochemistry Part XXX Crystal and molecular structures of chalcone | 11 |
Conformational studies Part I Crystal and molecular structures of cis12dipchlorobenzoyl and cis | 17 |
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A. R. Katritzky alcohol alkyl Amer anion aqueous aromatic ation axial benzene bond bromination calculated carbanion carbon acids carbon atom carbon tetrachloride carbonyl catalyst Chem chemical shifts Chemistry chloride complex compounds concentration conformation correlation coupling constants crystal cyclohexane derivatives difference dilute dimethyl sulphoxide dioxan electron elimination energy equation equatorial equilibrium ester ethanol ether experimental Figure fluorene formation fraction H₂O H₂SO hydrogen hydrolysis hydroxide indicators interaction intermediate ionisation isomer isomerization isotope effect k₁ k₂ kcal kcal./mole kinetic measured mechanism methyl mixture mole mole-¹ molecular molecule n.m.r. spectra nitration nitrogen nucleophilic observed obtained oxide oxime oxygen parameters phenyl Phys piperidine plot proton pyridines R. P. Bell radical rate constants ratio reaction reactivity ring shown shows sodium solution solvent spectrum structure substituents sulphuric acid t-butyl Table temperature Tetrahedron thiophen transition values