Host channel framework determined by C-H center dot center dot center dot pi interaction in the inclusion crystal of 2,5-bis(diphenylmethyl)hydroquinone and benzaldehyde

摘要

A new kind of host compound, 2,5-bis(diphenylmethyl)hydroquinone is designed and prepared. The crystal structure of the inclusion compound formed by the host with benzaldehyde was determined by single crystal X-ray diffraction. The result shows that the host exhibits a stable conformation through intramolecular CH(...)pi interactions in the inclusion crystal, and benzaldehyde guest molecules are accommodated in the channel which is constructed by the hosts, in which intermolecular C-H(...)pi interactions between the hosts, play an important role in the architecture of channel framework besides van der Waal's forces. The complex structure is further stabilized by strong hydrogen bonding (O1-H1(...)O1) and two weak C-(HO)-O-... interactions (C5'-H5'(...)O1, C3-H3(...)O1') between the host and guest. (C) 2004 Elsevier B.V. All rights reserved.