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Journal of Structural Chemistry

2014 year, number 6

NEW β-DIKETONATE COBALT(II) COMPLEXES WITH 1,3-DIAMINOPROPANE: SYNTHESIS, STRUCTURES, AND THERMAL BEHAVIOR

S. I. Dorovskikh, D. A. Piryazev, O. A. Plyusnina, L. N. Zelenina, N. B. Morozova
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: cobalt(II) adducts, β-diketonate, single crystal X-ray diffraction analysis, DSC, MOCVD, Ño-containing films

Abstract

Structures of β–diketonate cobalt(II) chelates with 1,3–diaminopropane (pda) are determined by single crystal X–ray diffraction (XRD) at temperatures of 100 K and 293 K respectively: Co(pda)(hfac)2 and Co(pda)(tmhd)2 (hfac is 1,1,1,5,5,5–hexafluoro–pentane–2,4–dionato(–), tmhd is 2,2,6,6–tetramethyl–heptane–3,5–dionato(–)). Crystallographic data for Co(pda)(hfac)2 (C13F12H12O4N2Co) are: a = 8.427(3) Å, b = 10.625(3) Å, c = 11.369(3) Å, α = 111.751(7)°, β = 97.968(7)°, γ = 93.070(7)°, space group P–1, V = 930.2(5) Å3, Z = 2, dx = 1.954 g/cm3, R = 0.0241; for Co(pda)(tmhd)2 (C25H48N2O4Co): a = 9.459(1) Å, b = 11.856(1) Å, c = 14.186(1) Å, α = 71.607(2)°, β = 71.314(2)°, γ = 88.179(2)°, space group P–1, V = 1425.7(2) Å3, Z = 2, dx = 1.137 g/cm3, R = 0.0265. In both cases, there are only van der Waals interactions between the molecules. Thermodynamic values of the melting processes are found by differential scanning calorimetry (DSC). Experiments on the chemical vapor deposition of cobalt-containing films are performed with the use of Co(pda)(hfac)2 as a precursor.