Chemistry Journal of Moldova

 


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https://doi.org/10.19261/cjm.2024.1247

Graphycal Abstract: The present study describes synthesis, research and definition of the structure of five new coordination compounds of Germanium(IV) and 3d-metals with 1-hydroxyethane-1,1-diphosphonic acid and 1,10-phenanthroline, which in crystals are organic-inorganic hybrid ensembles with three-dimensional networks formed by numerous intermolecular hydrogen bonds between complex cations, anions, and crystalline water molecules.




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https://doi.org/10.19261/cjm.2024.1212

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Graphycal Abstract: Two new compounds – a mononuclear nickel(II) compound with di-paratolylglyoxime (DpatH₂) - [Ni(DpatH₂)₃]SO₄∙1,4-H₂bdc∙2.5DMF∙H₂O (1) and a binuclear manganese(II) compound with dianilineglyoxime (DAnH₂) - [Mn₂(DAnH₂)₂(1,3-bdc)₂(DMSO)₄] (2) (1,4- and 1,3-bdc are 1,4- and 1,3-benzenedicarboxylic acids, respectively) have been obtained. The IR spectra of the complexes were studied and molecular and crystal structures of the compounds were determined by single crystal X-ray diffraction method. Compound 1 is ionic and contains a complex cation in which three neutral DpatH₂ ligands are coordinated to the nickel atom. Complex 2 is a molecular binuclear complex in which, in addition to the two neutral ligands DAnH₂ and four DMSO, two 1,3-benzenedicarboxylic anions are coordinated to the metal atoms in a bridging manner.





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https://doi.org/10.19261/cjm.2024.1168

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Graphical Abstract: A new heterometallic iron(III) compound, derivative of salicylic acid, catena–poly[bis(methanol)-bis(N,N–dimethylacetamide)–tris(m–salicylato)–bis(m–salicyl)–dicalcium(II) iron(III)], has been synthesized and characterized by infrared spectroscopy, single-crystal X-ray diffraction and elemental analysis. Single-crystal X-ray diffraction study revealed that synthesized compound forms an 1D coordination polymer with general formula {[FeCa₂(Sal)₂(SalH)₃ (DMA)₂(CH₃OH)₂]}_n. The compound crystallizes in the P2₁/c space group of the monoclinic system with the following unit cell parameters: а= 9.76785(9), b= 37.3386(4), c= 13.82575(12) Å, β= 103.6421(9)°, Z= 4. The independent unit cell of the obtained compound contains one iron and two calcium ions, in which the iron(III) ion has an octahedral coordination sphere. The different coordination modes of the five molecules of salicylic anions revealed by IR analysis were confirmed by X-ray studies, showing that the salicylate anions play the role of bridging ligands and coordinate in three different ways, thus the carboxylic group forms bridges through three different coordination pathways, namely: bidentate, tridentate and pentadentate fashion.



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https://doi.org/10.19261/cjm.2023.1121

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Supplementary Material (PDF)
Graphical Abstract: The present study extends the research and describes synthesis strategy, structural properties and biological activity of complex compound (HPhen)₄[(µ-O){Ge₂(OH)(µ-Tart)₂}₂]·9H2O, which comprises a tartratogermanate anion and the protonated form of 1,10-phenanthroline as the cationic component.




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https://doi.org/10.19261/cjm.2023.1059

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Graphical Abstract: A heterometal complex [Ru^IIRu^III(n-C₃H₇COO)₄Au^III(CN)₄]_n was synthesized. The X-ray crystallography elucidated a chain molecule of alternating arrangement of Ru₂(n-C₃H₇COO)⁴⁺ and Au(CN)^4– units with cis-bridging mode. Magnetic susceptibility data showed that magnetic interaction between Ru^IIRu^III units (S= 3/2) is negligible small with a zero-field splitting parameter D of 60 cm^–1. 







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