2-(1-Naphthyl)benzothiazoline, 1-nabz, reacts with palladium(II) acetate to yield, in addition to the expected bis[2-N-(1-naphthylmethylideneamine)benzenethiolato]palladium(II), a minor by-product tetrakis[2-N-(1-naphtylmethylideneamine)benzenethiolato-C0,N,S]-tetrapalladium(II) (2) of composition C68H44N4Pd4S4; the novel structure of 2 is established by X-ray diffraction.