Concave π-prismand hydrocarbon [2.2.2]cyclophanes and their crystalline Ag-triflate complexes

Autor:	Karri Airola, Erkki Kolehmainen, Elina Wegelius, Tanja Lahtinen, Kari Rissanen
Rok vydání:	1999
Předmět:	chemistry.chemical_classification Crystallography X-ray absorption spectroscopy chemistry.chemical_compound Hydrocarbon chemistry Structure analysis Nuclear magnetic resonance spectroscopy Crystal structure Trifluoromethanesulfonate Cyclophane
Zdroj:	Journal für praktische Chemie. 341:237-244
ISSN:	1521-3897 1436-9966
Popis:	New small concave hydrocarbon cyclophanes were prepared via the well-known HD-2SO2-method. The cyclophanes obtained are isomers of the very well-known [2.2.2]p,p,p-cyclophane, C24H24, a π-prismand efficiently complexing Ag+-ion. X-ray crystal structure determinations showed the bis-sulfide 7 (1,10-dithia[3.3.2]m,p,p-cyclophane) to be helically chiral and that the conformation of the parent hydrocarbon cyclophane 13 ([2.2.2]m,p,p-cyclophane) does not change dramatically upon complexation with the Ag+-ion. The 16- and 17-membered [2.2.2]m,m,p- and [2.2.2]m,p,p-cyclophane (15 and 16) also act as π-prismands and form surprisingly similar crystalline 1:1 Ag-triflate complexes (π-prismates) as the well-known 18-membered p,p,p-isomer proved by the X-ray structure analysis.
Databáze:	OpenAIRE
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