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MISCELLANEOUS SPIN SYSTEMS NotES AND LITERATURE REFERENCES
substituents in ethyl derivatives
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absorption bands acetone acetylenic acid alkyl Amer anisotropic effects aromatic axial benzene boron atoms C–C bond C6Hs calculated carbon atoms cent CF3COOH Chem chemical shifts Chemical shifts measured chloride compounds contribution correlation cycles sect cyclohexane deshielding diamagnetic dilution directly bonded doublet electronegativity ethylene examined external reference F chemical fluorine fluorine atoms fluorine nuclei furan geminal GUTowsky H resonance halides high field hybridisation hydrogen atoms J. D. Roberts Lauterbur line widths linear liquid long range coupling low field magnetic measured in ppm methyl derivatives methyl groups mole molecular molecules monosubstituted multiplet nitrogen non-equivalent observed obtained olefinic paramagnetic phosphorus Phys polymer predicted pyridine pyrrole resonance band resonance spectrum ring current ring hydrogen nuclei sample Schneider secē SHIFTs AND SPIN Shoolery shown in Fig signal similar soln solution solvent spin coupling constants structure substituents temperature thiophene trans triplet values vinyl