Volatile palladium(II) β-iminoketonates of the general formula Pd(R–C(NH)–CH–CO–R1),where R and R1 are CH3, CF3, C(CH3)3 in various combinations, were synthesized and identified. Thermal properties of the resulting palladium(II) complexes in the solid phase were studied by thermogravimetric analysis under an argon atmosphere. The temperature dependence of the saturated vapor pressure was measured for the compounds by the flow method and thermodynamic characteristics of vaporization processes, enthalpy ΔHT and entropy ΔSTo, were determined. The atom-atomic potential calculation of the van der Waals energy (Ecryst) of the crystal lattice was performed and the results were compared to the experimental values of the sublimation enthalpy for the complexes under study.
1. Kodas, TT, Hampden-Smith, M 1994 The chemistry of metal CVD VCH Weinheim, Germany .
2. Igumenov IK . MO CVD of noble metals. J Phys IV. 1995; 5:C5-489-495.
3. Zharkova, GI, Igumenov, IK, Tyukalevskay, NM 1988 β-Diketonates palladium(II). Coord Chem 14:67–74 (in Russian).
4. Igumenov IK , Zharkova GI, Baidina IA, Stabnikov PA, Semyannikov PP, et al. Systematical investigations of new Pd (II) precursors for MO CVD processes. European Conference on Chemical Vapor Deposition. Germany, Electochemical Soc Proceedings. 2005; 2005-09: 675–82.
5. Siedle, AR, Newmark, RA, Pignolet, LH 1983 Structure of palladium Bis(hexafluoro-acetylacetonate) and the systematics of its acid–base chemistry. Inorg Chem 22:2281–2286 .
6. Baker, GJ, Raynor, JM, Smits, JM et al. 1986 Crystal structure of Bis-(2,2,6,6-tetramethylheptane-3,5-dionato) palladium(II). J Chem Soc Dalton Trans 12:2655–2662 .
7. Okeya, S, Ooi, S, Matsumoto, K, Nakamura, Y 1981 Bis-(β-diketonato)-palladium(II) and platinum(II) complexes. Bull Chem Soc Jpn 54:1085–1095 .
8. Belosludov, RV, Igumenov, IK, Belosludov, VR, Spakov, VP 1994 Dynamical and thermodynamical properties of the acetylacetones of Cu(II), Al(III), In(III), and Rh(III). Mol Phys 82:51–66 .
9. Kitaygorodsky AI . Molecular crystals. Moskow, Nauka. 1971; 424 (in Russian).
10. Molecular crystal. Cambridge University Press. 1995; 221.
11. Stabnikov, PA, Baidina, IA, Zharkova, GI, Igumenov, IK, Borisov, SV 2000 Packing of complexes and intermolecular interactions in the crystals of volatile palladium(II) diketonates. Crystal structure of palladium(II) benzoyltrifluoroacetonate. J Struct Chem 41:106–116 .
12. Morozova, NB, Semyannikov, PP, Trubin, SV, Stabnikov, PA, Bessonov, AA, Zherikova, KV, Igumenov, IK 2009 Vapor pressure of some volatile iridium (I) compounds with carbonyl, acetylacetonate and cyclopentadienyl ligands. J Therm Anal Calorim 96:261–266 .
13. Gurr, GE The structure of Bis-(4-amino-3-penten-2-ono) copper(II),–nickel(II), and–palladium(II). Inorg Chem 1964 3:614–615 .
14. McGee, TJ, Walter, JL 1978 Infrared spectra of the copper(II), nickel(II) and palladium(II) complexes of 4-amino-3-pentene-2-one. Spectrosc Lett 11:765–798 .
15. Zharkova, GI, Stabnikov, PA, Baidina, IA, Smolentsev, AI, Tkachev, SB 2009 Synthesis, properties, and crystal structures of volatile β-ketoiminate Pd complexes, precursors for palladium chemical vapor deposition. Polyhedron 28:2307–2312 .
16. Zharkova, GI, Baidina, IA, Gromilov, SA, Igumenov, IK 1998 Synthesis and properties of palladium(II) and platinum(II) complexes with trifluoroiminoketone. Crystal and molecular structure of bis-(1,1,1-trifluoro-4-iminopentane-2-onato)palladium(II). Coord Chem 24:117–122 (in Russian).
17. Baidina, IA, Zharkova, GI, Pervukhina, NV, Gromilov, SA, Igumenov, IK 2004 X-ray study of volatile Ni(II) Cu(II), and Pd(II) complexes of β-ketoimine pivaloyltrifluoracetone. J Struct Chem 45:678–687 .
18. Zharkova, GI, Baidina, IA, Stabnikov, PA 2008 New volatile complexes of Ni(II) and Pd(II) with 2, 26, 6-tetramethyl-3-amino-4-hepten-5-one: structure and properties. J Struct Chem 49:309–316 .
19. Sysoev, SV, Morozova, NB, Zharkova, GI, Igumenov, IK et al. 1998 Vapor pressure and thermoanalytical study of diethyldithiocarbamates of platinum metals. J Therm Anal Calorim 53:87–96 .
20. Rappe, AK, Casewit, CJ, Colwell, KS et al. 1992 UFF, a full periodic table force field for molecular mechanics and molecular dynamics simulations. J Am Chem Soc 114:1024–1035.
21. Titov VA , Kokovin GA. Mathematics in chemical thermodynamics. Novosibirsk, Nauka. 1980; 98–105 (in Russian).