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<p>In this work, the interaction of aluminum tris(3-chlorosulfenyl-2,4-pentanedionate) with aluminum acetylacetonate (product I), as well as cobalt(III) acetylacetonate without trapping the evolved gaseous HCl, and with addition of a binding agent (pyridine) to the system (product II and III) at a reactant ratio of 1:1 was carried out. The isolated products turned out to be soluble in toluene, chloroform, THF and were characterized using elemental analysis, IR spectroscopy, thermogravimetric analysis (TGA), X-ray phase analysis (XRD), NMR spectroscopy, scanning electron microscopy, EXAFS spectroscopy. Gel permeation chromatography data showed that the resulting 3-S-substituted acetylacetonates are polymers, with the yield of high-molecular product being highest for product I. Based on X-ray diffraction data, the polymers are amorphous in nature with particle sizes within 1.5 nm. EXAFS spectroscopy near the L<sub>3</sub><sup>59</sup>Co allowed us to calculate the actual lengths of the coordination bonds and showed that the coordination numbers of cobalt(III) in product II in the first and second coordination spheres are close to the expected model, while in the product III sample they are underestimated due to the accompanying processes of binding of the products with pyridine.</p>

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Polynuclear complexes based on aluminum acetylacetonate sulfenyl chloride and metal acetylacetonates (M = Al, Co)

  • 期刊论文

  • 发表日期：

    2026年5月14日

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  • K. A. Pervakov,
  • N.P. Shapkin,
  • E.A. Yudnikov,
  • N.P. Ivanov,
  • A.L. Trigub,
  • A.N. Fedorets

摘要

In this work, the interaction of aluminum tris(3-chlorosulfenyl-2,4-pentanedionate) with aluminum acetylacetonate (product I), as well as cobalt(III) acetylacetonate without trapping the evolved gaseous HCl, and with addition of a binding agent (pyridine) to the system (product II and III) at a reactant ratio of 1:1 was carried out. The isolated products turned out to be soluble in toluene, chloroform, THF and were characterized using elemental analysis, IR spectroscopy, thermogravimetric analysis (TGA), X-ray phase analysis (XRD), NMR spectroscopy, scanning electron microscopy, EXAFS spectroscopy. Gel permeation chromatography data showed that the resulting 3-S-substituted acetylacetonates are polymers, with the yield of high-molecular product being highest for product I. Based on X-ray diffraction data, the polymers are amorphous in nature with particle sizes within 1.5 nm. EXAFS spectroscopy near the L359Co allowed us to calculate the actual lengths of the coordination bonds and showed that the coordination numbers of cobalt(III) in product II in the first and second coordination spheres are close to the expected model, while in the product III sample they are underestimated due to the accompanying processes of binding of the products with pyridine.