Abstract
The host 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol (1) exhibits different conformational isomers in inclusion compounds with 1,3,3-trimethyl-2-oxabicyclo[2,2,2]octane (2) and trans-p-propenylanisole (3). The molar ratios of hosts and guests in an asymmetric unit of complexes (1)+(2) and (1)+(3) are 1∶2 and 2∶1, respectively. In the complex of (1)+(2), the host (1) is linked with (2) via hydrogen bonding and exhibits antiperiplanar conformation, whereas in the 2∶1 host–guest complex (1)+(3), hosts (1) are associated with each other by hydrogen bonding and the complex adopts a gauche conformation; guests contact with hosts by C–H⋯π weak hydrogen bonding. The structures of the two complexes and conformational isomers of the host have been determined by X-ray crystallographic analysis.
Published Version
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