15N AND 13C NMR STUDY OF SOME CARBOXALDEHYDE SEMICARBA ZONES AND RELATED COMPOUNDS

Chinese Journal of Magnetic Resonance ›› 1989, Vol. 6 ›› Issue (1): 65-70.

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¹⁵N AND ¹³C NMR STUDY OF SOME CARBOXALDEHYDE SEMICARBA ZONES AND RELATED COMPOUNDS

Yu Jun¹, Guo Zungru²

1. Institute of Photographic Chemistry, Academia Sinica, Beijing;
2. Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing

Received:1987-12-15 Revised:1988-04-11 Published:1989-03-05 Online:2018-01-22

Abstract

Abstract: The ¹⁵N and ¹³C NMR chemical shifts of 12 carboxaldehyde semicarbazones and related compounds have been determined at the natural-abundance. The substituent effects on ¹⁵N and ¹³C chemical shifts were studied and compared with each other. The results show that the ¹⁵N chemical shifts are more sensitive to structural and electronic effects than ¹³C NMR.
The correlation of ¹⁵N chemical shifts for para-substituted N-penyl-carboxaldehyde semicarbazones with Hammett substituent constants (σ) was studied and compared with that of benzenamines.

Key words: Carboxaldehydc scmicarbazones, ¹⁵N NMR, ¹³C NMR

Yu Jun, Guo Zungru. ¹⁵N AND ¹³C NMR STUDY OF SOME CARBOXALDEHYDE SEMICARBA ZONES AND RELATED COMPOUNDS[J]. Chinese Journal of Magnetic Resonance, 1989, 6(1): 65-70.

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¹⁵N AND ¹³C NMR STUDY OF SOME CARBOXALDEHYDE SEMICARBA ZONES AND RELATED COMPOUNDS

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