Abstract
The development of novel chromogenic organic host molecules has attracted much attention because of their potentiality of application to analytical and material sciences. In this work we have synthesized the new host molecules 1 and 2 containing two salicylideneamine structures within a molecule and investigated properties of their inclusion crystals. In these molecules three tautomeric structures and possible : diketo (KK), ketoenol (KE), and dienol (EE) forms arising from keto-enol type tautomerism on the two salicylideneamine moieties. The X-ray analysis revealed that in inclusion crystals of 2.(CH2Cl2)2, 2 exists as the KK form. while in 1.(acetone), 1 has the structure intermediate between EE and KK forms. Further attempts to prepare the sulfur analog 3 are in progress.
