Dibenzo-15-crown-5 ether and its sodium thiocyanate complex. X-ray crystallographic and NMR studies in the solid phase and in solution

Autor:	Y. Lear, C. Bensimon, G. W. Buchanan, S. Mathias
Rok vydání:	1991
Předmět:	Carbon-13 NMR satellite Organic Chemistry Ether General Chemistry Carbon-13 NMR Catalysis chemistry.chemical_compound Crystallography chemistry 15-Crown-5 Sodium thiocyanate Multiplicity (chemistry) Two-dimensional nuclear magnetic resonance spectroscopy Single crystal
Zdroj:	Canadian Journal of Chemistry. 69:404-414
ISSN:	1480-3291 0008-4042
DOI:	10.1139/v91-062
Popis:	For the title systems, single crystal X-ray data indicate the presence of totally asymmetric structures. These features are reflected in the multiplicity of resonances in the solid phase 13C NMR spectra. Some of the 13C chemical shift trends are analyzed in terms of torsional angle influences. In solution, resonance assignments have been made with the aid of 2D methods. Stereochemical inferences are drawn from NOESY spectra and 1H–1H couplings. Low temperature solution experiments indicate that conformational interconversions in both the free ligand and the NaNCS complex are rapid on the NMR timescale down to 163 K. Key words: crown ethers, NMR, stereochemistry.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b72f83b5ff18b04f426ac0be8c690660 https://doi.org/10.1139/v91-062 Zobrazit plný text záznamu