Stereochemistry supramolecular

Liining. U. Schyja. W. Selectivity Enhancement by Concave Reagents. In NATO ASl Series, Series C Mathematical and Physical Sciences, Siegel. J.S.. Ed. Supramolecular Stereochemistry, Kluwer Academic Publishers. 1995 Vol. 473. 223-2. ... 

The highly selective processes of molecular recognition are, of course, of stereochemical nature. Thus may be defined a supramolecular stereochemistry that extends from supermolecules to polymolecular assemblies. Different spatial dispositions of the components of a supermolecule with respect to each other lead to supramolecular stereoisomers. Their eventual interconversion will depend on the properties of the interactions that hold them together, i.e. on the variation of the intermolecular interaction energy with distances and angles. There is thus an intermolecular conformational analysis like there is an intramolecular one. 

The monosubstituted corannulene derivatives tert-butylcorannulene (3S) and iso-propylcorannulene (36) have lower symmetry than corannulene therefore their reduction provided evidence for the formation of the dimers of corannulene tet-raanion. The dimers of monosubstituted coraimulene tetraanions are expected to exhibit supramolecular stereochemistry, existing in meso and d,l dimeric forms. 

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