ISSN:
1572-8854
Keywords:
Cyclooligomerization
;
orthocyclophanes
;
structure
;
X-ray diffraction
;
C−H...O molecular interactions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract 3,4,5-Trimethoxybenzyl alcohol was cyclooligomerized with a bentonite clay used as a catalyst. Results of the crystal structure analysis of the racemic (±) nonamethoxy[1,1,1]orthocyclophane trimer, C30H36O9, are described. The structure was determined by X-ray diffraction at 293 K and shown to belong to the triclinic space group P $$\bar 1$$ . The compound possesses a distorted crown conformation with unusual C−H...O intermolecular interactions, and with a crystal packing not observed before in other related derivatives. The racemic mixture was also discriminated in its two enantiomeric isomers, using proton NMR and Eu(III) as a chiral shift reagent.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01670332
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