Abstract
The crystal structure of inclusion compound constituted by chiral tris(binol)cyclotriphosphazene ((S,S,S)-TBP) host and o-xylene guest has been determined. It has an orthorhombic unit cell with space group P212121 (no. 19) and unit cell dimensions a=10.9265(4)Å, b=17.8959(8)Å, and c=30.3964(1)Å. Guest free (S,S,S)-TBP is an amorphous material according to the literature (Chem. Eur. J.2001, 7, 1486–1494) and crystal structure has not been reported so far. Formation of inclusion adduct with o-xylene guests acting as a molecular glue allowed to determine the structural features. (S,S,S)-TBP has a propeller-like shape with binol units considered as paddles. Naphthalene units are twisted at 51° in those paddles. Effects of this twist on spirocyclic seven-membered ring and on cyclotriphosphazene ring are discussed.
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