A novel series of Pd (II) complexes derived from 2-thiophenecarboxaldehyde and 1, 8- diaminonaphthalene has been synthesized and characterized by various physico-chemical and spectroscopic techniques viz., elemental analyses, IR, UV–vis, 1H and 13C NMR spectroscopy, and ESI-mass spectrometry. The structure of ligand, 2-(2-thienyl)-2, 3-dihydro- 1H-perimidine has been ascertained on the basis of single crystal X-ray diffraction. All Pd ( ...