Chemistry Journal of Moldova

Inorganic and coordination chemistry

Author(s):

Grigore Timco, Robin Pritchard, George Whitehead, Richard Winpenny


Field: Inorganic and coordination chemistry
Type: Invited paper
Issue: 2022 Volume 17, no.1
Pages: 9-17
Keywords: chromium, carboxylate, polymetallic ring, crystallography.
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Abstract (PDF)
Graphical Abstract: Four new {Cr8} rings have been synthesized and characterized; they are all based on the classic [CrF(O2CtBu)2]8 ring 1. Three routes have been studied. The first is direct synthesis, by reacting hydrated chromium(III) fluorides with the acid; this has been used to produce  [CrF(O2CEt)2]8 3. The second route uses 3 as a precursor and substitute with an incoming carboxylate. This has been used to make [CrF(O2CCCl3)2]8 4 and [CrF(O2CC6F5)2]8 5. The third route uses 
N-ethyl-D-glucamine (H5Etglu) as a template and produces chiral rings [Cr8F4(Etglu)(O2CtBu)15] 6. The single crystal X-ray structures of these new compounds are reported.


 


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Author(s):

Viorina Gorinchoy, Olesea Cuzan, Silvia Melnic, Oleg Petuhov, Sergiu Shova


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2021 Volume 16, no.2
Pages: 66-75
Keywords: heteronuclear μ3-oxo complex, Fe2Cr cluster, X-ray diffraction, thermal analysis.
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Abstract (PDF)
Graphical Abstract:
Two new μ3-oxo trinuclear heterometallic Fe2IIICrIII complexes with furan-2-carboxylic and salicylic acids with the composition: [Fe2CrO(C4H3OCOO)6(CH3OH)3]NO3·0.5CH3OH and [Fe2CrO(C6H4(OH)COO)7(CH3OH)2]·2DMA were synthesized starting from iron(III) and chromium(III) salts mixture. The complexes structures were confirmed by elemental analysis, IR, Mössbauer spectroscopies, and X-ray analysis. The atomic absorption spectroscopy confirmed that the iron: chromium ratio is 2:1. The thermal properties of both heteronuclear complexes have been investigated in oxidizing and inert atmospheres revealing the stability of the trinuclear core up to 170 and 220°C, respectively.


 


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Author(s):

Valeriia Zozulia, Vladimir Ovchynnikov, Tetiana Slyva, Julia Rusanova, Volodymyr Amirkhanov


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2021 Volume 16, no.2
Pages: 58-65
Keywords: carbacylamidophosphate, synthesis, zinc, complex, crystal structure.
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Graphical Abstract: The novel binuclear Zn(II) complex of general formula Zn2(L)4(CH3OH)2 where HL is N-[bis(benzylamino)phosphoryl]-2,2,2-trichloroacetamide has been synthesized from non-aqueous solution and characterized by elemental analysis, FTIR and NMR spectroscopy as well by X-ray single crystal diffraction. This complex represents the third example of binuclear complexes with this ligand within four known for today.


 


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Author(s):

Viorina Gorinchoy


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2020 Volume 15, no.2
Pages: 62-68
Keywords: homotetranuclear salicylate, iron(III), cluster, IR spectroscopy, X-ray crystal structure.
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DOI: http://dx.doi.org/10.19261/cjm.2020.758

Abstract (PDF)
Graphical Abstract: A new tetra-homonuclear iron(III) cluster, [Fe4O2(Sal)4(H2O)6]·4DMA·0.75H2O, where Sal= salicylic acid and DMA= N,N-dimethylacetamide consolidated via two µ3-oxo- and four salicylate-bridges was synthesized and characterized by IR spectroscopic method as well as by single crystal X-ray diffraction analysis. The structure of the obtained tetranuclear compound consists of four FeIII atoms in a “butterfly” arrangement. The coordination sphere of each of the two central FeIII atoms is generated by two μ3-oxo-bridging atoms and four oxygen atoms provided by the tridentate-bridging Sal2- ligands, while the coordination polyhedron of another two iron atoms involve six oxygen atoms from three water molecules, two salicylic and one μ3-oxigen atom. The Fe-O distances within Fe-O-Fe bridge are of 2.102(3) Å (for wing-body) and 2.038(3) Å (for body-body).






Downloads: 95

Author(s):

Koba Amirkhanashvili, Alexandre Sobolev, Nani Zhorzholiani, Vladimer Tsitsishvili


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2020 Volume 15, no.1
Pages: 67-74
Keywords: lidocaine complex, nickel(II), crystal structure, hydrogen bond.
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Abstract (PDF)
Graphical Abstract: This paper reports on the synthesis and structure re-refinement of bis(lidocaine) diaquatetrathiocyanatonickelate(II). The compound with the formula (LidH)2[Ni(NCS)4(H2O)2], where Lid is (2-(diethylamino)-N-(2,6-dimethylphenyl)acetamide, crystallizes in the monoclinic space group P21/c with a= 18.3509(5), b= 7.6532(2), c= 14.9585(4) Å, β= 109.964 (2)°, V= 1974.57 (9) Å3, and Z= 2. Coordination of the Ni2+ ion with thiocyanate ions and water molecules generates slightly distorted octahedral anion [Ni(NCS)4(H2O)2]2–  with N-bonded thiocyanate groups, while two protonated cations LidH+ remain in an outer coordination field. 


 


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Author(s):

Elena Martsinko, Inna Seifullina, Elena Chebanenko, Olha Pirozhok, Viktoriya Dyakonenko, Svitlana Shishkina


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.2
Pages: 56-62
Keywords: citric acid, 1,10-phenanthroline, germanium(IV), tin(IV), nickel(II) complex.
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Graphical Abstract: The new complexes [Ni(phen)3][Ge(HCit)2]•2H2O (1), [Ni(phen)3][Sn(HCit)2]•3H2O (2) (where phen is 1,10-phenanthroline, H4Cit is citric acid) were obtained. The identity, composition, and thermal stability of the complexes were established by elemental analysis, thermogravimetry, and IR spectroscopy. According to the X-ray diffraction data, the bis(citrate)germanate / bis(citrate)stannate [Ge/Sn(HCit)2]2- carries out the role of the dianion while two halves of the nickel complexes with phenanthroline [Ni(Phen)3]2+ are cations.


 


Downloads: 125

Author(s):

Olesea Cuzan-Munteanu, Silvia Melnic, Sergiu Shova


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.2
Pages: 48-55
Keywords: iron cluster, mixed valence, X-ray analysis, µ3-oxo, crystal structure, hydrogen bond.
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Graphical Abstract: This paper reports on the synthesis of a new trinuclear homometalic mixed-valent iron carboxylate cluster with furan-2-carboxylic acid. The complex with the formula [Fe2IIIFeIIO(C4H3OCOO)6(H2O)3]∙0.5CH3CN•2.25H2O was characterized by X-ray analysis that revealed that the compound crystalizes in the triclinic centrosymmetric group P-1, with the following unit cell parameters: a = 10.2758(6)Å, b = 11.5991(9) Å, c = 19.7349(15) Å, α = 105.060(7)°, β =  94.216(6)°, γ = 101.662(6)°.


 


Downloads: 149

Author(s):

Elena Gorincioi, Eduard Coropceanu


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.2
Pages: 38-47
Keywords: NMR, zinc, cadmium, oxime, homodinuclear complex, coordination polymer.
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Graphical Abstract: A series of homobi- and polynuclear zinc and cadmium coordination compounds supported by 1,2-cyclohexanedionedioxime and bridging bidentate ligands: 4,4'-bipyridyl, 1,2-bis(4-pyridyl) ethane, 1,3-bis(4-pyridyl) propane and dipiridil sulfide were characterized by the experimental techniques of 1H and 13C NMR spectroscopy. Individual NMR data of compounds are consistent with their assignment as complexes.


 


Downloads: 83

Author(s):

Nataliia Kariaka, Olena Litsis, Yuriy Kolomzarov, Paula Gawryszewska, Sergii Smola, Nataliia Rusakova, Victor Trush, Tatiana Sliva, Vladimir Amirkhanov


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 54-62
Keywords: lanthanide complex, photoluminescence, carbacylamidophosphate, chelate ligand, thin film.
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Abstract (PDF)
Graphical Abstract: The lanthanides coordination compounds LnL3, LnL3Phen and LnL3Dipy with bulky aryl-functionalised carbacylamidophosphate (CAPh) ligand N-(diphenylphosphoryl)benzamide (HL=PhC(O)N(H)P(O)Ph2) were synthesized for luminescent thin films producing. The films were obtained by vacuum evaporation and spin coating methods and exhibited intensive monochromatic photoemission with decay times equal to 0.78 1.34 ms.



 


Downloads: 255

Author(s):

Viorina Gorinchoy, Vera Zubareva, Elena Melnic, Victor Kravtsov


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2018 Volume 13, no.1
Pages: 46-53
Keywords: heterotrinuclear μ3-oxo complex, X-ray, IR analysis, Mössbauer spectrum, TG data.
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Abstract (PDF)
Graphical Abstract: The reaction between iron and nickel salts with ammonium salicylate results in the formation of a new trinuclear heterometallic complex 
[hexa-µ2-salicylato-µ3-oxo-(methanol)(dimethylformamide) aquadiiron(III) nickel(II)] methanol dimethylformamide. The synthesized [Fe2NiO(SalH)6(CH3OH)(DMF)(H2O)]•DMF•CH3OH complex crystallizes in the monoclinic space group C2/c. The IR and Mössbauer spectra and thermal properties were studied.

 
 


Downloads: 155