The complexes PdL2X2 (L = p-nitrosodimethylaniline, p-nitrosodiethylaniline; X = Cl, Br, I) have been prepared. The principal absorption band in the visible spectra of the complexes has been identified as a n-n* transition centered primarily on the ligands on the basis of its high oscillator strength, the similarity of the latter to that of the free organic ligand, and the insensitivity of the band position to the nature of the halide. Infrared data indicate that palladium is bonded through the NO group.Canadian Journal of Chemistry, 47, 3075 (1969) p-Nitrosodialkylanilines have been used for bright red suspension to stand for several hours and then the colorimetric determination of palladium and filter through a G4 sintered-glass crucible. Wash the precipitate with three 5 ml portions of water and then three platinum for many years "lid products 5 m1 portions of diethyl ether. Dry at 110 "C for 3 h and were isolated from the reaction mixtures and then under vacuum over anhydrous calcium chloride for formulated as PdL,CI, (L = p-NOC6H4NH,, several days. p-NOC6H4N(Me),, p -~~C 6~4~~t 2 )(1) andThe procedures for the other complexes are the same Ptb-NOC6H4NMe2),C1, (2).except that the iodide complexes should not be heated.The microanalytical figures obtained appear in Table I.In this paper we rep0rt the Illtra-Decom~osition tem~eratures were determined with a violet-visible spectra, and infrared spectra of simple electric melting point apparatus. the complexes PdL2x2 (L = ~-Noc,H,NM~,, he complexes were only readily soluble in chloroform, p -~~~6~,~~t 2 ; x = ~1 , B~, 1) and conclude tetrachloroethane, tetrahydrofuran, and acetone. The that Pd is bonded to the NO group. solutions in chloroform were stable (for several weeks) and the original compounds were recoverable from them.