Chemistry Journal of Moldova

Inorganic and coordination chemistry

COORDINATION COMPOUNDS OF OXOVANADIUM(IV) BASED ON S-METHYLISOTHIOSEMICARBAZIDE AS DYES FOR THERMOPLASTIC POLYMERS

Author(s):

Maria Cocu, Stefan Manole


Field: Inorganic and coordination chemistry
Type: Short communication
Issue: 2015 Volume 10, no.2
Pages: 95-98
Keywords: coordination compounds, oxovanadium(IV), dyes, thermoplastic polymer.
Full Text (PDF): Download
Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2015.10(2).13

Graphical Abstract:
 We have investigated the properties as dyes of coordination compounds synthesized by us previously (8-(1',2'-naphthyl)-1-R-3-methyl-6-thiomethyl-4,5,7-triazanona-1,3,5,7-tetraenato-1,1'-diolato(-)-O1, O1', N4, N7-vanadil, where R=CH3 (1) , C6H5 (2)), which can be used for colouring thermoplastic masses. The compounds have a high photostability (7 points), thermostability (>250°) and an intensity of colour that give a low consumption (0.006-0.010g).

Downloads: 32

SONOCHEMICAL SYNTHESIS OF HEMATITE NANOPARTICLES

Author(s):

Mihail Iacob


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2015 Volume 10, no.1
Pages: 46-51
Keywords: hematite, nanoparticles, iron oxides, sonochemistry.
Full Text (PDF): Download
Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2015.10(1).06

Graphical Abstract:
 Hematite nanoparticles were prepared by a procedure consisting in sonication of μ3-oxo trinuclear iron(III) acetate of composition [Fe3O(OOCCH3)6(H2O)3]NO3∙4H2O, {Fe3O}NO3, as iron source, in strong basic conditions followed by thermal treatment at 600˚C. The formation of the hematite was confirmed by IR spectroscopy, X-ray powder diffraction and Raman spectroscopy while the shape and size of the nanoparticles and their agglomeration were evidenced and estimated on the basis of the images taken with TEM technique.

Downloads: 758

CRYSTAL STRUCTURE OF {[La2(CNCH2COO)6(H2O)4]H2O}n COMPLEX

Author(s):

Ana Lazarescu, Elena Melnic, Sergiu Shova, Victor Kravtsov, Constantin Turta


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2015 Volume 10, no.1
Pages: 52-56
Keywords: coordination polymers, lanthanum (III), cyanoacetic acid, crystal structure.
Full Text (PDF): Download
Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2015.10(1).07

Graphical Abstract:
 A lanthanum(III) cyanoacetate complex  {[La2(CNCH2COO)6 (H2O)4]∙H2O}n (1) was synthesized and characterized by X-ray single-crystal analysis. The complex 1 exhibits one-dimensional coordination polymer structure. Cyanoacetate ligands coordinated in the bidentate bridging and tridentate-chelating bridging modes. The cyano-group of ligand is not coordinated to the lanthanide ion.

Downloads: 69

DINUCLEAR NICKEL(II) PIVALATE WITH µ-AQUA AND DI-µ-PIVALATO BRIDGES SHOWING A FERROMAGNETIC INTERACTION

Author(s):

Masahiro Mikuriya, Melissa Schumacher, Chinatsu Kawano, Takahiro Akihara, Kenta Ono, Daisuke Yoshioka, Hiroshi Sakiyama, Makoto Handa


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 62-66
Keywords: nickel complex, dinuclear complex, magnetic property, ferromagnetic interaction
Full Text (PDF): Download
Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).09

Graphical Abstract: 
Dinuclear nickel(II) pivalate with µ-aqua- and di-µ-pivalato-bridges having monodentate pivalato and monodentate pivalic acid molecules, [Ni2{O2CC(CH3)3}4(OH2){HO2CC(CH3)3}4], was prepared 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. The magnetic data analysis showed a ferromagnetic interaction between the two nickel atoms.


Downloads: 47

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)
Full Text (PDF): Download
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). 




Downloads: 35

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
Full Text (PDF): Download
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.


Downloads: 34

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
Full Text (PDF): Download

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.


Downloads: 28

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
Full Text (PDF): Download
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.


Downloads: 46

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
Full Text (PDF): Download

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.

Downloads: 48

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.
Full Text (PDF): Download
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]), 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 µ1,3-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 NiII ions of the dinuclear subunits and negligible coupling across the dicarboxylate bridges.


Downloads: 31