Novel palladium complexes of Se,N,Se tridentate ligands derived from cycloalkeno-1,2,3-selenadiazoles
Abstract
The reaction between [Pd2(dba)3] (dba = dibenzylideneacetone), a trialkylphosphine, and a cycloalkeno-1,2,3-selenadiazole in toluene under reflux leads in good yield to the complexes [PdL(PR3)] [L = SeC(R1)C(R2)N NC(R1)C(R2)Se; R1–R2 = (CH2)n; R = Et, Bun] containing a novel Se,N,Se tridentate ligand formed by the coupling of two 1,2,3-selenadiazole molecules; the structure of the product with R = Bun and n = 4 has been determined by X-ray crystallography.