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Pancrazi, A.; Kaboré, I.; Delpech, B.; Astier, A.; Khuong-Huu, Q.; Lukacs, G.
Canadian journal of chemistry, 08/1977, Letnik: 55, Številka: 15Journal Article
The various effects (α, β, γ and δ) on the 13 C nmr of azido steroids have been measured. For cyclohexane azides constrained to equatorial and axial configurations, the α-effects were determined to be 33.6 and 31.2 ppm. Both γ- and δ-effects have magnitudes near those for OH and NH 2 groups. On the other hand, the β-effect of the azides is slightly smaller than those of hydroxyls or amines as its magnitude is reduced by a γ-effect of the second nitrogen atom of the azide group. This additional γ-effect is a function of the spatial arrangement of the Cβ—H bond with respect to the azide group. Journal translation
