Abstract
Structural aspects of binding of π-rich neutral guests with L and anions with [H6L]6+ are examined thoroughly. L forms inclusion complexes with π-rich solvents, 2DMSO⊂L (1), 3DMF⊂L2 (2), (DMF·benzene·DMF)⊂L2 (3), MeCN⊂L (4), and MeCOMe⊂L (5) in dimethylsulfoxide (DMSO), dimethyl formamide (DMF), benzene/DMF, acetonitrile (MeCN), and acetone (MeCOMe) respectively. The single crystal X-ray structural analysis of complexes illustrates cavity and cleft binding of these guests via N–H···O interactions in 1, 2, 3, 5 and N–H···N interactions in 4 with the secondary nitrogen center of L and the hydrogen bonding acceptor atoms of the solvent guests. Inclusion of benzene in the side pocket is also observed in 3. Our efforts to isolate single crystals with solvents such as MeOH, EtOH, CHCl3, and CH2Cl2 are unsuccessful. Single crystal X-ray diffraction study has also shown the encapsulation of nitrate in the cleft of [H6L]6+ via N–H···O hydrogen bonding interactions in [H6L][NO3]6·HNO3·6H2O (6), whereas in [H6L]2[Cl...
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