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

The beta-aminovinylketone ligands CH3C(NH2)CHC(O)CH3 (1) and CH3C(NHCH3)CHC(O)CH3 (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 PdCl2 salt in amine medium gave the volatile chelate metal complexes Pd[CH3C(NH)CHC(O)CH3](2) (3) and Pd[CH3C(NCH3)CHC(O)CH3](2) (4). The obtained compounds were identified by elemental analysis, H-1 and C-13 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 O2N2. (C) 2009 Elsevier Ltd. All rights reserved.