Square-planar aminonitronate transition metal complexes (M = CuII, NiII, PdII, and PtII)
2017; Elsevier BV; Volume: 467; Linguagem: Inglês
10.1016/j.ica.2017.08.034
ISSN1873-3255
AutoresMikhail V. Il’in, Dmitrii S. Bolotin, Alexander S. Novikov, Vitalii V. Suslonov, Н. В. Чежина, Michael P. Bubnov, Vladimir K. Cherkasov, Gertruida J. S. Venter, Andreas Roodt,
Tópico(s)Metal-Organic Frameworks: Synthesis and Applications
ResumoTreatment of the aromatic aminonitrones p-RC6H4C(NH2)N+(Me)O− (R = NMe2, Cl) with CuCl2·2H2O, NiCl2·2H2O, β-PdCl2, or cis-[PtCl2(Me2SO)2] in the presence of a base leads to the [M{p-RC6H4C(NH)N+(Me)O−}2] (M = Cu, Ni, Pd) (72–95%) or [Pt{p-RC6H4C(NH)N+(Me)O–}Cl(Me2SO)] (ca. 80%) complexes, respectively. These compounds were characterized by elemental analyses (C, H, N), HRESI+-MS, FTIR, 1H and 13C{1H} NMR, and for the CuII and NiII complexes EPR and magnetic susceptibility. In addition, eight species were studied by single-crystal X-ray diffraction. In the X-ray structures of 2a–d, the hydrogen bonds are responsible for the formation of 1D polymeric chains. These bonds were evaluated by DFT calculations (M06/DZP-DKH level of theory) and topological analysis of the electron density distribution within the formalism of Bader's theory (QTAIM method). Estimated strengths of these non-covalent interactions are 2.7–4.4 kcal/mol.
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