Quarterly Journal of the Chemical Society of London, Issue 1, Pages 1-776 |
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Results 1-3 of 84
Page 108
... shift.5 The rearrangement seems , therefore , again to occur from an excited singlet state , although there is yet no clear evidence of whether it is ( as implicitly assumed ) the π , π * state of the methylenemalono- nitrile ...
... shift.5 The rearrangement seems , therefore , again to occur from an excited singlet state , although there is yet no clear evidence of whether it is ( as implicitly assumed ) the π , π * state of the methylenemalono- nitrile ...
Page 321
... shift for this proton . The small reld shifts of the methyl protons ( VI ) reflect the increas- ordered solute structure as the aggregates are formed . Chemical shift behaviour of the B - lactam protons is not FIGURE 2 . 198- 194- 190 ...
... shift for this proton . The small reld shifts of the methyl protons ( VI ) reflect the increas- ordered solute structure as the aggregates are formed . Chemical shift behaviour of the B - lactam protons is not FIGURE 2 . 198- 194- 190 ...
Page 453
... shift of one of the B - methyl doublets in the exo - isomer persists under all conditions examined . These included lowering the temperature to -50 ° ( shift = + 0 · 89 ; signals became very broad below -50 ° ) , varying the ...
... shift of one of the B - methyl doublets in the exo - isomer persists under all conditions examined . These included lowering the temperature to -50 ° ( shift = + 0 · 89 ; signals became very broad below -50 ° ) , varying the ...
Contents
Page | 1 |
Electrochemical Indications of New Oxidation States in Transitionmetal Dicarbollide Complexes | 8 |
Crystal Structure and Bonding in the Dinuclear Complexes CHW SPhMCO M Cr | 14 |
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acetate acid Acta adduct alcohol alkaloids alkyl Amer analysis anion aqueous aromatic assigned atoms band benzene carbon carbonyl cation chelate Chem chemical shifts Chemical Society Chim chloride cm-¹ co-ordination Comm complexes compounds configuration confirmed coupling Crystal Structure cyclopropane Department of Chemistry derivatives double bond doublet electron ester ether Figure formation formed gave H₂O hydride hydrogen hydrolysis i.r. spectrum ibid indicate Inorg intermediate irradiation isolated isomer ketone ligand metal methanol methyl methylene mixture molecular molecule n.m.r. spectrum nitrogen observed obtained olefinic oxidation oxygen phenyl phosphine photolysis Phys presence protons pyridine radical ratio reaction rearrangement Received reported resonance ring room temperature shown shows similar singlet sodium solution solvent space group spectra spectroscopy stereochemistry studies substituted suggested sulphur Summary synthesis Table Tetrahedron Letters tetrahydrofuran tion triphenylphosphine tritium University values X-ray yield