Inorganic and coordination chemistry

MIXED-METAL COMPLEXES OF MIXED-VALENT DINUCLEAR RUTHENIUM(II,III) CARBOXYLATE AND TETRACYANIDONICKELATE(II)

Author(s):

Masahiro Mikuriya, Yusuke Tanaka, Daisuke Yoshioka, Makoto Handa

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 93-99

Keywords: dinuclear ruthenium(II,III) carboxylate; magnetic property; mixed-metal complex; tetracyanido nickelate(II)
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2014.09(1).11

Graphical Abstract: Mixed-metal chain complexes constructed from lantern-type dinuclear ruthenium(II,III) carboxylate unit and tetracyanidonickelate(II), (PPh₄)_n[Ru₂(O₂CCH₃)₄Ni(CN)₄]n•nH₂O (1) and (PPh₄)n[Ru₂{O₂CC(CH₃)₃}₄]_3n[Ni(CN)₄]_2n•2nH₂O (2), where very weak antiferromagnetic interaction is operating, were synthesized and characterized by elemental analysis and IR and UV-vis spectroscopies and temperature dependence of magnetic susceptibilities (4.5—300K).

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MIXED-VALENT TETRANUCLEAR MnIIMnIII3 COMPLEX WITH 1,3-DIAMINO-2-HYDROXYPROPANE-N,N’,N”,N”’-TETRAACETIC ACID

Author(s):

Masahiro Mikuriya, Nobuyuki Nagao, Satoshi Kurahashi, Atsushi Tabuchi, Seiki Tomohara, Motohiro Tsuboi, Daisuke Yoshioka, Hiroshi Sakiyama, Akira Fuyuhiro

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2014 Volume 9, no.1
Pages: 100-105

Keywords: manganese complex; tetranuclear complex; magnetic property; mixed-valent complex
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2014.09(1).12

Graphical Abstract: Mixed-valent tetranuclear MnIIMnIII3 complex with 1,3-dimino-2-hydroxypropane-N,N’-N”-N”’-tetracetic acid, Ca₂[Mn₄{µ-OHO}(dhpta)₂(CH₃COO)₂], where considerable antiferromagnetic interactions are operating, was synthesized and characterized by elemental analysis and IR and UV-vis spectroscopies, temperature dependence of magnetic susceptibilities (4.5—300K), and single-crystal X-ray crystallography.

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THE STUDY OF ORIENTATION OF AXIAL AMINO-LIGANDS IN SOME Co(III) DIOXIMATES

Author(s):

Andrei Rija, Eduard Coropceanu

Field: Inorganic and coordination chemistry
Type: Review
Issue: 2013 Volume 8, no.2
Pages: 8-20

Keywords: Co(III) dioximates, ﬂuorine containing anions, ligands orientation, H-bonds, biostimulation properties
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).01

Graphical Abstract: As a result of the comparative study of axial ligand orientation towards the equatorial plane in α - dioximates Co (III) obtained by us and those described in the specialized literature (found in Cambridge Crystallographic Data Centre) showed that the external anions and solvent molecules contribute to the orientation of axial ligands as selenourea and thiourea. For aniline and sulphanilamide ligands, is more convenient the parallel orientation to form π-π interactions between the aromatic rings of ligands and the metallocycle of equatorial plane.

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NICKEL(III) COMPLEX DERIVED FROM 2-HYDROXY-3-METHOXYBENZALDEHYDE SEMICARBAZONE AND 2,2’-BIPYRIDINE

Author(s):

Carolina Vomisescu, Paulina Bourosh, Victor Kravtsov, Diana Dragancea

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 78-82

Keywords: semicarbazone, binuclear nickel(II) complex, crystal structure
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).09

Graphical Abstract: An ONO tridentate semicarbazone Schiff base and a bidentate dipyridyl ligand give a nickel(II) dimer, where atom centers are bridged by phenolate oxygen donors.

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HOMOTRINUCLEAR Fe3III μ – OXO SALICYLATE CLUSTER. SYNTHESIS, STRUCTURE AND PROPERTIES

Author(s):

Viorina Gorinchoy, Sergiu Shova, Elena Melnic, Victor Kravtsov, ConstantinTurta

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2013 Volume 8, no.2
Pages: 83-89

Keywords: carboxy-cluster, Iron(III), salicylate, IR, Mössbauer, TG data
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(2).10

Graphical Abstract: A reaction of iron and barium nitrate with ammonium salicylate in the mixture of solvents leads to the formation of the new homotrinuclear complex, [Fe₃O(SalH)₇(H₂O)₂]∙(DMAA)₂(MeOH)(THF)_1,5(H₂O)_2,6. Single-crystal X-ray study shows that the titled complex with the moiety {Fe₃O} belongs to the well-known group of μ3-oxohomotrinuclear carboxylates. The IR and MS studies are in accordance with x-ray data. Thermal behaviour of the complex was studied.

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DINUCLEAR COMPLEXES AS BUILDING BLOCKS FOR TETRA-NUCLEAR MACROCYCLIC COMPLEXES WITH DITHIOLATE MACROCYCLIC LIGAND

Author(s):

V. Lozan

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 58-77

Keywords: coordination chemistry, amino-thiophenolate ligands, di- and tetranuclear complexes, ferrocene and naphthalene diimide derivatives, polynuclear complexes.
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(1).08

Graphical Abstract: A series of novel tri-, tetra- and pentanuclear complexes composed of dinuclear LM units (M=Co, Ni, Zn; L=24-membered macrocyclic hexaaza-dithiophenolate ligand) and ferrocenecarboxylate ([CpFeC₅H₄CO₂]ˉ), 1,1’-ferrocenedicarboxy-late ([Fe(C₅H₄-CO₂)₂]^2ˉ), acetylene-dicarboxylate, terephthalate, isophthalate, and naphthalene diimide dicarboxylate groups is reported. The complexes, have been synthesized and characterised by UV/Vis-, IR-, NMR-spectroscopy, Cyclovoltammetry, and X-ray crystallography. Each dicarboxylate dianion acts as a quadridentate bridging ligand linking two bioctahedral LM₂ units via µ_1,3-bridging carboxylate functions to generate discrete dications with a central LM₂(O₂C-R-CO₂)M₂L core. The magnetic properties of these compounds reveal the presence of weak ferromagnetic exchange interactions between the Ni^II ions of the dinuclear subunits and negligible coupling across the dicarboxylate bridges.

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SYNTHESIS AND CRYSTAL STRUCTURE OF A NEW Fe(II) α-DIOXIMATE WITH TRIAZINE

Author(s):

О. Ciobanica, P. Bourosh, О. Bologa, I. Bulhac, V. Lozan, V. Shofransky

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 78-82

Keywords: synthesis; Fe(II)dioximate; 1,3,5-triazine, crystal structure.
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Abstract (PDF)

DOI: dx.doi.org/10.19261/cjm.2013.08(1).09

Graphical Abstract: The interaction of [Fe(DfgH)₂Py₂] (where DfgH=monodeprotonated diphenylglyioxime, Py-pyridune) and 1,3,5-triazine (Trz) in chloroform resulted in a new coordination compound with the composition [Fe(DfgH)₂(Trz)₂]·2CHCl₃ (1). The crystal structure of 1, determined by single crystal X-ray diffraction, revealed that Fe(II) atom is coordinated by four oximic nitrogen atoms of two DfgH and two nitrogen atoms of two Trz ligands resulting in octahedral surrounding.

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A REACTION OF 4, 5-DIPHENYLIMIDAZOLE NITRATION IN THE PRESENCE OF SOME 3D-METALS NITRATES

Author(s):

I. Voda, V. Druta, C. Indricean, I. Ciumacov, C. Turta

Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2012 Volume 7, no.2
Pages: 124-129

Keywords: solvothermal synthesis; Cobalt(II), Nickel(II), Zinc(II) complexes; 4,5-diphenyl-2-nitroimidazole, physico- chemical properties.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2012.07(2).05

Graphical Abstract: By interaction of cobalt(II), nickel(II), or zinc(II) nitrate with 4,5- diphenylimidazole in methanol in solvotermal conditions the new derivative of imidazole (4,5-diphenyl-2-nitroimidazole) and three new coordinative compounds [M(4,5-Ph2ImNO₂)₂(CH₃OH)₂] have been synthesized and investigated. Metal ions have a distorted octahedral environment with N₂O₄. Coordination number of metal is six. Ligand is coordinated to metal ion by one oxygen atom of nitrogroup and one nitrogen atom of imidazole.

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AZOLIGANDS AS BRIDGED IN MACROCYCLIC DINICKEL COMPLEXES

Author(s):

Vasile Lozan

Field: Inorganic and coordination chemistry
Type: Review
Issue: 2010 Volume 5, no.1
Pages: 7-23

Keywords: coordination chemistry, structures, azoligands, nickel macrocyclic complexes, amino-thiophenolate ligands.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2010.05(1).01

Graphical Abstract: The coordination chemistry of dinickel macrocyclic

hexaamine-dithiophenolate complexes of Robson-type with azoligands is presented in this microreview. All complexes have been characterised by IR-,UV/Visspectroscopy, and X-ray crystallography. The bioctahedral transition metal complexes of the type [(L₆)Ni₂(μ-L')]⁺exhibit a rich coordination chemistry since the active coordination site L' is accessible for a wide range of exogenous coligands.

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STABILIZATION OF UNUSUAL SUBSTRATE COORDINATION MODES IN DINUCLEAR MACROCYCLIC COMPLEXES

Author(s):

Vasile Lozan

Field: Inorganic and coordination chemistry
Type: Review
Issue: 2010 Volume 5, no.1
Pages: 24-35

Keywords: coordination chemistry, borohydride, hexasulphide, molybdate, amino-thiophenolate ligands.
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Abstract (JPEG)

DOI: dx.doi.org/10.19261/cjm.2010.05(1).02

Graphical Abstract: The steric protection offered by the macrobinucleating hexaazaditiophenolate

ligand (L) allows for the preparation of the first stable dinuclear nickel(II) borohydride bridged complex, which reacts rapidly with elemental sulphur producing a tetranuclear nickel(II) complex [{(L)Ni₂}2(μ-S₆)]²⁺ bearing a helical μ₄-hexa- sulfide ligand. The [(L)Co^II ₂]²⁺ fragment have been able to trap a monomethyl orthomolybdate in the binding pocket. Unusual coordination modes of substrate in dinuclear macrocyclic compounds was demonstrated.

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