Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

Determination of ¹⁵N chemical shifts and heteronuclear coupling constants of substituted 2,2-dimethylpenta-3,4-dienal hydrazones is presented. The chemical shifts were determined by gradient-enhanced inverse-detected NMR techniques and ¹H-¹⁵N coupling constants were extracted from phase-sensitive gradient-enhanced single-quantum multiple bond correlation experiments. Stereospecific behaviour of the coupling constants ²J(¹H,¹⁵N) and ¹J(¹H,¹³C) has been used to determine the configuration on a C=N double bond. The above-mentioned compounds exist predominantly as E isomers in deuteriochloroform.

Keywords: 2,2-Dimethylpenta-3,4-dienal; Hydrazones; Inverse-detected NMR spectroscopy; ¹⁵N chemical shifts; ¹H-¹⁵N coupling constants.