Abstract
Electron donor–acceptor interaction of morpholine (morp) with chloranilic acid (cla) and picric acid (pa) as π-acceptors was investigated spectrophotometrically and found to form stable charge-transfer (CT) complexes (n–π*) of [(Hmorp)
2(cla)] and [(Hmorp)(pa)]
2. The donor site involved in CT interaction is morpholine nitrogen. These complexes are easily synthesized from the reaction of morp with cla and pa within MeOH and CHCl
3 solvents, respectively.
1HNMR, IR, elemental analyses, and UV–vis techniques characterize the two morpholinium charge-transfer complexes. Benesi–Hildebrand and its modification methods were applied to the determination of association constant (
K), molar extinction coefficient (
ɛ). The X-ray crystal structure was carried out for the interpretation the predict structure of the [(Hmorp)(pa)]
2 complex.