R. Berscheid, M. Nieger, F. Vögtle, „Orientational Selectivity for the Inclusion of Acetonitrile in Tailor-made Macrobicyclic Host Molecules“; J. Chem. Soc., Chem. Commun. 1991, 1364-1366.

The first ?–?-interaction between a C–H acidic acetonitrile methyl group and and a ‘?–basic’ host cavity is described based on the X-ray structure of the complex between the host 3 and MeCN; comparison with the structure of the complex between 1 and MeCN shows orientational selectivity for MeCN in the two hosts.

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