In addition to well-known dinuclear phenylselenolato palladium complexes, the reaction of [PdCl 2 (PPh 3 ) 2 ] and NaSePh affords small amounts of novel trinuclear and hexanuclear complexes [Pd 3 Se(SePh) 3 (PPh 3 ) 3 ]Cl (1) and [Pd 6 Cl 2 Se 4 (SePh) 2 (PPh 3 ) 6 ] (2). Complex 1 is triclinic, P1, a=13.6310(2), b=16.2596(2), c=16.9899(3) A, α=83.1738(5), β=78.9882(5), γ=78.7635(5) o . Complex 2 is monoclinic, C2/c, a=25.7165(9), b=17.6426(8), c=27.9151(14) A, β=110.513(2) o . There are no structural forerunners for 1, but the hexanuclear complex 2 is isostructural with [Pd 6 Cl 2 Te 4 (TeR) 2 (PPh 3 ) 6 ] (R=Ph, C 4 H 3 S) that have been observed as one of the products in the oxidative addition of R 2 Te 2 to [Pd(PPh 3 ) 4 ]. Mononuclear palladium complexes may play a significant role as building blocks in the formation of the polynuclear complexes.