The complexes [Pd(µ-SeC5H4N-n)(η3-allyl)]2 (n = 2, 4; allyl = C3H5, C4H7) have been synthesized in dichloromethane-methanol by the reaction of Na(SeC5H4N-n) with [Pd(µ-Cl)(η3-allyl)]2 in high yield. The structure of [Pd(µ-SeC5H4N-4)(η3-C4H7)]2 was established by single-crystal X-ray diffraction analysis. Thermolysis of [Pd(µ-SeC5H4N-n)(η3-C4H7)]2 in furnace or by Aerosol-Assisted Chemical Vapor Deposition technique, yielded nanocrystals or thin film of d7Se4 whereas in oleylamine it gives Pd17Se15. The SEM images of Pd7Se4 showed spherical shaped particles.