作者:S. I. Dorovskikh、N. V. Kuratieva、S. V. Tkachev、S. V. Trubin、P. A. Stabnikov、N. B. Morozova
DOI:10.1134/s0022476614060092
日期:2014.11
Ligands with Schiff bases are obtained in the condensation of propylenediamine (pda) or 2,2-dimethylpropylenediamine (dmpda) with acetylacetone (Hacac) in the 1:2 molar ratio. The ligands are characterized by the elemental analysis methods, T (melt) = 90-92 A degrees C for pda(Hacac)(2) (pda(acac)(2) is N,N'-propylene-bis(acetylacetoniminato) (2-)), T (melt) = 84-86 A degrees C for dmpda(Hacac)(2) (dmpda(acac)(2) is N,N'-2,2-dimethylpropylene-bis(acetylacetoniminato) (2-)). The tautomerism of the ligands is established by the single crystal X-ray diffraction (XRD) analysis, IR spectroscopy, and H-1, C-13 NMR spectrometry. The synthesized complexes [Cu(pda(acac)(2))] (1), T (melt) = 121-122 A degrees C and [Cu(dmpda(acac)(2))] (2), T (melt) = 156-158 A degrees C are studied by the XRD method. In both complexes, copper atoms have a planar square geometry, and the chelate bond lengths and angles are: Cu-O a parts per thousand Cu-N 1.903(2)-1.942(3) , a O-Cu-N = 94.44(12)-94.99(12)A degrees for 1 and Cu-O a parts per thousand Cu-N 1.909(1)-1.943(2) , a O-Cu-N = 94.63(6)A degrees for 2. By the thermogravimetric method it is found that both complexes can be passed practically quantitatively into the gas phase.