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2 Bulletin of the Polish Academy of Sciences. Chemistry

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Investigations of intramolecular hydrogen bond by nitrogen magnetic resonance methods

100%

Schilf W. , Stefaniak L.

1998

tom Vol. 46, No. 1

15-33

Several examples of application of nitrogen NMR in investigation of intramolecular hydrogen bonds in nitrogen containing compounds have been presented. The exceptional properties of this method in quantitative estimation of physical parameters of hydrogen bridges have been confirmed.

2,1,3-Benzoselenodiazole-5-carbaldehyde and derivatives preparations, 13C, 15N and 77Se NMR spectroscopy

80%

Morkved E. H. , Bjorlo O. , Schilf W. , Bernatowicz P.

2000

tom Vol. 48, No. 1

47-56

2,l,3-Benzoselenadiazole-5-carbaldehyde 5 has been prepared in 53% overall yield from 5-methyl-2,l,3-benzoselenadiazole 1, by a four-step synthesis. Compounds 1-5 and 2,1,3-benzo-selenadiazole 8 have been analysed by 1H, 13C, 15N and 77Se NMR spectroscopy, and structural implications are discussed. Some imines and diimines were prepared from 5, but low solubility in organic solvents made these compounds of little interest for further studies.