• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2020, Volume: 7, Issue: Supplementary 3, Pages: 62–66

Original Article

NMR Spectral Studies of Some Six–membered and Seven–membered Saturated Hetero Cyclic Compounds-calculation of Torsional Angles from Vicinal Coupling Constants–using Altona’s Equation


Some six and seven membered saturated hetero cyclic compounds were prepared; then, from their vicinal coupling constants, proton – proton Torsional angles were calculated using Altona’s Equation. 1 H NMR spectra were recorded in DMSO – d6 . The chemical shifts were compared with those in CDCl3 . The COSY, NOESY and 13C-1 H correlation spectra had been recorded to assign the signals unambiguously. Then, torsional angles were calculated using electronegativity values of the substituents; the electronegativity value of oxygen was taken to be 3.50.Calculations were made accurately.

Keywords: Altona’s Equation, COSY, Conformation, NOESY, Orientation 


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