Abstract
Tetrabenzo-18-crown-6 (1) shows distinct solid-state inclusion properties towards a number of OH-acidic, CH-acidic and low-polar uncharged organic molecules. The single crystal X-ray analysis of the inclusion complex between1 and EtNO2 (1∶1) is reported. Crystals are monoclinic,P21/c, witha=12.887(1),b=19.365(2),c=10.776(1) A, β=96.33(2)o,Dc=1.321g cm−1,Z=4. The host macroring has a conformation similar to a ‘dentist's-chair’. The complex is stabilized mainly by C−H...O type interactions involving the methyl group of the EtNO2 guest molecule which is highly disordered. The nitroethane guests are trapped in channels formed by the host macrocycles.
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