Preparation and Crystal Structure of Guest-Dependent Charge-Transfer Host System Using 1,1′-Bi-2-naphthol and 2-Chloro-5-methyl-benzoquinone

A guest-dependent charge-transfer (CT) host system was found that was composed of racemic (rac)-1,1′-bi-2-naphthol as an electron donor and 2-chloro-5-methyl-benzoquinone as an electron acceptor; in this complex, aromatic guests (benzene/toluene), electron-acceptor guests (tetrafluoro-1,4-benzoquinone (TF-BQ)), or alcohol guests (ethanol) can variously be included by changing the packing of electron-donor and -acceptor molecules. When ethanol was used as a guest, a chiral CT complex including ethanol was obtained.