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Experimental Procedures 256
Correlations of H Resonance Spectral Parameters with Molecular
f Acetylated aldopentapyranose derivatives
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13C chemical 13C resonance 19F chemical shifts 19F resonance spectrum 31P chemical shifts absorption bands acetone acetylenic acid alkyl Amer anisotropic anisotropic effects aromatic axial benzene boron atoms C—C bond calculated carbon atoms cent CF3COOH Chem Chemical shifts measured chloride compounds contribution correlation Coupling Constants cycles cycles sec cycles sec-1 cyclohexane derivatives deshielding diamagnetic dilution directly bonded doublet electronegativity ethylene examined external reference fluorine atoms fluorine nuclei furan geminal H Chemical H resonance H—H coupling constants halides high field hybridisation hydrogen atoms J. D. Roberts linear liquid Liquid Liquid low field magnetic Mc sec-1 measured in ppm methyl groups molecular molecules monosubstituted multiplet nitrogen non-equivalent observed obtained olefinic paramagnetic phosphorus Phys polymer predicted pyrrole resonance band resonance spectrum ring current ring hydrogen nuclei sample sec1 shown in Fig signal soln solution solvent Spin Coupling Constants spin-spin coupling structure substituents temperature thiophene trans triplet values vinyl