Molecular and crystal structure ofβ-isosparteine monoperchlorate

Autor:	Z. Kałuski, Andrzej Katrusiak, Jerzy Skolik
Rok vydání:	1988
Předmět:	Quinolizidine Chemistry Hydrogen bond Cyclohexane conformation Protonation General Chemistry Crystal structure Condensed Matter Physics Perchlorate chemistry.chemical_compound Crystallography Structural Biology Molecule Piperidine Spectroscopy
Zdroj:	Journal of Crystallographic and Spectroscopic Research. 18:353-364
ISSN:	1572-8854 0277-8068
DOI:	10.1007/bf01195688
Popis:	The crystal structure; determined by X rays, and the13C-NMR spectra ofβ-isosparteine perchlorate are presented. The quinolizidine moieties are present in acis ring-juncture; all piperidine rings are in a chair conformation. The two nitrogen atoms are linked by a hydrogen bond of 2.704(5) A. The proton at N(16) is also involved in a weak hydrogen bond with the O(2) of the perchlorate anion. The two quinolizidine moieties-protonated and unprotonated-differ only slightly in conformation; the protonation caused small but significant changes in the length of the bonds about the nitrogen atoms. The title compound was obtained by chemical transformations of 17-oxosparteine and protonation with an equimolar amount of HClO4 in methanol.13C-NMR spectra in DMSO-2H6 revealed the presence of the symmetricalcis-cis bis-quinolizidine structure of the salt in solution.
Databáze:	OpenAIRE
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