Structural studies of supramolecular β-cyclodextrin complexes with butyrophenone and valerophenone: an explanation for photochemical reaction modificationElectronic supplementary information (ESI) available: full experimental details. See http://www.rsc.org/suppdata/cc/b0/b002828m/Chemical Insight from Crystallographic Disorder–Structural Studies of Supramolecular Photochemical Systems, Part 4; Part 3, T. J. Brett, J. M. Alexander and J. J. Stezowski, J. Chem. Soc., Perkin Trans. 2, 2000, in press.

Abstract

X-Ray crystallographic studies of β-cyclodextrin (β-CD) inclusion complexes with butyrophenone and valerophenone characterize these complexes as 2∶2 β-CD/guest systems with the alkyl chains of the included guest molecules conformationally restricted; the structures explain the reported observation of the modification of the Norrish type II photoreaction for the included aryl alkyl ketones in crystalline β-CD complexes.