Studies on intramolecular hydrogen bonding of 1,1'-bis[N-formyl-N'-p-chlorophenylthiourea]ferrocene

1,1'-Bis[N-formyl-N'-p-chlorophenylthiourea]ferrocene was synthesized through the reaction of 1,1'-bis[formylisothiocyanate]ferrocene with p-chloroaniline. Its H-1 NMR, IR and mass spectra were studied. A single crystal structure determination showed that there are two intramolecular hydrogen bonds between the carbonyl group and N'-H of each N'H-C(S)-NH-C(O) moiety. They form two parallel planar six-membered rings. In addition, the hydrogen bonding rings are basically in the same plane with the Cp rings to which they are attached. This highlights its property in molecular recognition.