? Complex of palladium with O- and S-coordinated SO3H bridge group

Анцышкина, А. С.; Golyzhnikova, O. I.; Варгафтик, М. Н.; Садиков, Г. Г.; Ostrikova, V.N.; Porai-Koshits, M. A.; Моисеев, И. И.

doi:10.1007/bf00924868

Cited by 11 publications

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“…The formation of similar di‐ and tetranuclear structures based on bis‐hydrazones or bis‐thiosemicarbazones has been reported before: In rare cases, “in situ” aromatic ligand hydroxylation was also observed 22,23. As in compound 1 , dinuclear complexes can be stabilized by an exogenous monodentate and monoanionic ligand (hydroxide,22,24 ethanolate,25 chloride,23 methanolate,22,26,27 or azide28).…”

Section: Resultssupporting

confidence: 70%

Reaction of a Bis(benzoylhydrazone) with Copper(II): Complex Formation, Hydroxylation, and DNA Cleavage Activity

et al. 2013

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The reaction of the ditopic bis(benzoylhydrazone) of isophthalaldehyde (H2L) with copper(II) acetate in methanol under aerobic conditions afforded a green solid that contains the tetranuclear complex [Cu4L*2(OCH3)2] (1). The ligand L*, a bis(benzoylhydrazone) of 2,6‐diformylphenol, resulted from hydroxylation of the corresponding isophthalaldehyde derivative. H2L and 1 were characterized by different spectroscopic techniques, and their molecular structures were confirmed by single‐crystal X‐ray diffraction. The reaction of H2L with copper(II) under argon, on the other hand, resulted in a brown diamagnetic solid [Cu2L]·H2O (2) containing copper(I), which was readily transformed into 1 when exposed to air. In contrast, the reaction with [Cu(CH3CN)4][BF4] afforded a mononuclear complex [Cu(H2L)][BF4]·H2O (3), and single crystals of [Cu(H2L)2][BF4] (4) were isolated from its dichloromethane solution. H2L cleaved plasmid DNA in the presence of copper(II) independently of any reducing agent, but more efficiently when ascorbate was present. The cleavage process is likely oxidative because the enzyme catalase, which decomposes hydrogen peroxide, quenched the reaction. In the absence of ascorbate, the ligand H2L presumably acts as the reductant in the redox reaction, as exploited also in the synthesis of 1. As a consequence, a variety of reactive oxygen species were generated, eventually also leading to the cleavage of DNA (“self‐activating” chemical nuclease).

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Section: Resultssupporting

confidence: 70%

Reaction of a Bis(benzoylhydrazone) with Copper(II): Complex Formation, Hydroxylation, and DNA Cleavage Activity

et al. 2013

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“…[13][14][15][16][17] At the same time, the coordination chemistry of compounds under discussion is not well-developed, and only a limited number of structurally characterized transition metal complexes, including those of Ag, Cd, Co, Cu, Pd, Ru and trimeric peruoro-ortho-phenylenemercury (anti-crown compound), are known. [14][15][16][17][18][19][20][21][22][23][24] Recently, we reported the preparation and single-crystal Xray diffraction (XRD) characterization of Ir complexes with the parent 2,1,3-benzothiadiazole, its 4-amino-(1) and 4-hydroxyderivatives, and related acenaphtho [1,2-c] [1,2,5]thiadiazole as ligands. 25 In continuation of our research, in this paper, we report two novel applications of functionalized 2,1,3-benzothiadiazoles in coordination chemistry and crystal engineering, which covers the synthesis and characterization of a novel 2 : 1 complex between compound 1 and ZnCl 2 (complex 2; previously, Zn complexes with any 2,1,3-benzothiadiazoles were unknown), and unprecedented 1 : 1 co-crystals 26 of compound 1 and its synthetic precursor, 4-nitro-2,1,3-benzothiadiazole (3) (complex 4).…”

Section: Introductionmentioning

confidence: 99%

Novel applications of functionalized 2,1,3-benzothiadiazoles for coordination chemistry and crystal engineering

et al. 2014

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Two novel applications of functionalized 2,1,3-benzothiadiazoles for metal coordination chemistry and crystal engineering of organic solids are presented. 4-Amino-2,1,3-benzothiadiazole (1) forms a 2 : 1 complex with ZnCl 2 (complex 2) and a 1 : 1 complex with 4-nitro-2,1,3-benzothiadiazole (3) (complex 4). The structures of compounds 1-4 were confirmed by single-crystal X-ray diffraction and studied by UV-Vis and IR spectroscopy, and DFT and QTAIM calculations. Complex 2 is the first structurally defined Zn complex with 2,1,3-benzothiadiazole ligands. In this complex, both molecules 1 are coordinated to Zn only by amino groups, thus revealing a novel type of coordination of this ligand to the metal center.According to 1 H NMR data, complex 2 dissociates in CHCl 3 , THF or DMSO solutions. There are only a few examples of similar complexes, which are also considered to dissociate in solutions. In crystalline complex 4, molecules 1 and 3 form infinite alternating p-stacks connected by lateral S/N interactions between the neighboring stacks. Intermolecular S/N interactions are also observed in the crystals of individual 1 and 3 but the packing motifs are different from those in 4. DFT calculations predict a small charge transfer (CT, $0.02e at B97-D3 level) from 1 to 3 upon the formation of 4, which therefore is an unprecedented CT complex where both donor and acceptor moieties are the derivatives of the 2,1,3benzothiadiazole ring system. This finding creates some new prospects for the crystal engineering of organic solids. Crystalline complex 4 is characterized by an intense CT absorption band with a maximum at $550 nm. However, according to DFT and QTAIM calculations the complex is weakly bonded and its formation is not observed in CH 2 Cl 2 solution with 1 H NMR and UV-Vis techniques.

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“…Bond lengths (Table 2) are typical of REE trichloroacetates. [12][13][14][15] Infinite chains directed along the c axis are located in layers parallel to the (001) plane. Water molecules uncoordinated by the cation are located between the chains in the layer.…”

Section: Synthesis and Crystal Structuresmentioning

confidence: 99%

“…This one is isostructural to compounds with a lower water content. [13,14] A topological perspective of 2 is given in Figure 2, Sup. Inform.…”

Section: Synthesis and Crystal Structuresmentioning

confidence: 99%

A Solvate‐Isolated Linear Trimer CuNd₂(CCl₃COO)₈ ⋅ 6MeCN: Structure, Synthesis and Magnetic Behavior

Pushikhina

Kozlyakova

Карпова

et al. 2021

Zeitschrift anorg allge chemie

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A heterometallic copper-neodymium complex CuNd 2 (CCl 3 COO) 8 • 6MeCN (1) was synthesized from an aqueousorganic salt system and structurally characterized by single crystal X-Ray diffraction analysis. Thermal stability of 1 was studied. The crystal of 1 is tetragonal, with the space group I4, a = 11.5904(3), c = 23.9195(8) Å, V = 3213.3(2) Å 3 , Z = 8. Two crystallographically unsymmetrical Nd atoms and one Cu atom are bridged by trichloroacetic ligands into one-dimensional molecular chains. According to our experimental data on magnetic properties of 1, the compound could be classified as paramagnet at observed temperature range 2-300 K. In addition, the structure of the obtained Nd (III) trichloroacetate Nd(CCl 3 COO) 3 (H 2 O) 2 • 2H 2 O (2) was determined. The structural data of 1 and 2 were compared to the one for known rareearth trichloroacetates.

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? Complex of palladium with O- and S-coordinated SO3H bridge group

Cited by 11 publications

References 0 publications

Reaction of a Bis(benzoylhydrazone) with Copper(II): Complex Formation, Hydroxylation, and DNA Cleavage Activity

Reaction of a Bis(benzoylhydrazone) with Copper(II): Complex Formation, Hydroxylation, and DNA Cleavage Activity

Novel applications of functionalized 2,1,3-benzothiadiazoles for coordination chemistry and crystal engineering

A Solvate‐Isolated Linear Trimer CuNd₂(CCl₃COO)₈ ⋅ 6MeCN: Structure, Synthesis and Magnetic Behavior

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? Complex of palladium with O- and S-coordinated SO3H bridge group

Cited by 11 publications

References 0 publications

Reaction of a Bis(benzoylhydrazone) with Copper(II): Complex Formation, Hydroxylation, and DNA Cleavage Activity

Reaction of a Bis(benzoylhydrazone) with Copper(II): Complex Formation, Hydroxylation, and DNA Cleavage Activity

Novel applications of functionalized 2,1,3-benzothiadiazoles for coordination chemistry and crystal engineering

A Solvate‐Isolated Linear Trimer CuNd2(CCl3COO)8 ⋅ 6MeCN: Structure, Synthesis and Magnetic Behavior

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A Solvate‐Isolated Linear Trimer CuNd₂(CCl₃COO)₈ ⋅ 6MeCN: Structure, Synthesis and Magnetic Behavior