Abstract
Novel volatile complexes of Ni(II), Co(II), Mn(II), Zn(II) with methoxy-substituted β-diketonate ligands L = (CH3)2C(OCH3)-CO-CH-CO-C(CH3)3 and LF = (CH3)2C(OCH3)-CO-CH-CO-CF3 are obtained. The novel compounds are identified by a complex of techniques, including CHF elemental, mass spectrometric, and NMR spectroscopic analyses. According to the X-ray crystallographic analysis data, in the crystals, NiL2 and ZnL2 are asymmetric binuclear complexes in which metal atoms have a different coordination environment composed of ligand oxygen atoms (c.n.= 6 and 5) and are bridged by oxygen atoms, both chelate and from one of the methoxy groups. The mixed-ligand complex [NiL(dpm)]2 (dpm = dipivaloylmethanate: 2,2,6,6-tetramethyl-3,5-heptandionate) has a similar binuclear structure. It is found that complexes with non-fluorinated ligands pass to the gas phase as monomers whereas fluorine-containing complexes pass as dimers. The compounds are paramagnetic, except zinc complexes. In the binuclear complexes based on non-fluorinated ligands, a ferromagnetic exchange interaction of magnetic moments is observed while for fluorine-containing ligands it is antiferromagnetic.
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Russian Text © The Author(s), 2019, published in Zhurnal Strukturnoi Khimii, 2019, Vol. 60, No. 10, pp. 1701–1713.
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Urkasym kyzy, S., Krisyuk, V.V., Turgambaeva, A.E. et al. Methoxy-Substituted Transition Metal β-Diketonates: Synthesis and Properties. J Struct Chem 60, 1635–1647 (2019). https://doi.org/10.1134/S0022476619100093
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DOI: https://doi.org/10.1134/S0022476619100093