Synthesis, properties and crystal structures of volatile β-ketoiminate Pd complexes, precursors for palladium chemical vapor deposition

Abstract

The β-aminovinylketone ligands CH 3C(NH 2)CHC(O)CH 3 ( 1) and CH 3C(NHCH 3)CHC(O)CH 3 ( 2) were synthesized from 2,4-pentandione by amination with a water solution of the appropriate amine in toluene at room temperature. The reactions of 1 and 2 with the PdCl 2 salt in amine medium gave the volatile chelate metal complexes Pd[CH 3C(NH)CHC(O)CH 3] 2 ( 3) and Pd[CH 3C(NCH 3)CHC(O)CH 3] 2 ( 4). The obtained compounds were identified by elemental analysis, 1H and 13С NMR, IR-spectroscopy and were characterized by TGA and a single-crystal X-ray diffraction study. In compounds 3 and 4, the Pd atom has a square coordination environment Pd O 2N 2.