Crystal structure of an uncomplexed 25-crown-7 comprising one 2,6-pyridino and two 1,4-benzo condensations

Autor:	Kizakkekoikkal K. Chacko, Masilamani E. Sobhia, Edwin Weber
Rok vydání:	1994
Předmět:	Hydrogen bond Stacking General Chemistry Crystal structure Triclinic crystal system Condensed Matter Physics symbols.namesake chemistry.chemical_compound Crystallography chemistry Intramolecular force Pyridine symbols van der Waals force Single crystal Food Science
Zdroj:	Journal of Inclusion Phenomena and Molecular Recognition in Chemistry. 18:1-8
ISSN:	1573-1111 0923-0750
DOI:	10.1007/bf00706934
Popis:	Single crystal X-ray analysis of the uncomplexed crown macroring 1 is reported. Crystals are triclinic, $$P\bar 1$$ , witha=10.809(1),b=10.945(1),c=10.256(1) A, α=107.85(1), β=104.15(1), γ=87.27(1)°,D c=1.318 g cm−3,Z=2. Three torsion angles in the macrocycle take upgauche conformations in contrast to the usualanti conformation. The crystal structure is stabilized by intramolecular van der Waals forces and weak C−H...O and C−H...N hydrogen bond attractions. Stacking of pyridine rings is a noticeable packing feature in the crystal lattice.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a473d602a55d13fa250a774da3742e1 https://doi.org/10.1007/bf00706934 Zobrazit plný text záznamu Full text from SpringerLink