Novel Cobalt(II), Nickel(II) and Copper(II) Complexes of Neutral Orotic Acid. Synthesis, Spectroscopic and Thermal Studies

Yeşılel, Okan Zafer; Ölmez, Halıs

doi:10.1007/s11243-005-6289-z

Cited by 11 publications

(7 citation statements)

References 19 publications

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“…Although there are so many complexes of orotic acid in the first row metals in the literature, crystal structure determined the cadmium complex with orotate ligand has not found is our surprise. Recently, we have reported some transition metal-orotate complexes with various NϪdonor ligands [8], first neutral orotic acid complexes [9] and first bis(orotateϪN,O) complex [10]. Although the QX ligand may exhibit versatile coordinating modes such as monodentate [11] and bridged ligand [12], monomeric complexes have been written a few.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Spectral, Thermal and Structural Characterization of mer‐Triaquaorotatoquinoxaline Cadmium(II) Dihydrate

Yeşılel

Paşaoğlu

Akdağ

et al. 2007

Zeitschrift anorg allge chemie

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The new orotate complex of cadmium(II) with quinoxaline, mer-[Cd(HOr)(H 2 O) 3 (QX)]·2H 2 O, was synthesized and characterized by elemental analysis, FTϪIR spectroscopy, thermal analysis and single crystal XϪray diffraction techniques. The complex crystallizes in the triclinic system, space group P1. The Cd 2ϩ ion exhibits a distorted octahedral coordination by one bidentate orotate, one monodentate quinoxaline and three aqua ligands. The uncoordinated water molecules link the orotate, quinoxaline and 1731 aqua ligands via OϪH···O, OϪH···N hydrogen bonds. Thus, an extensive network of hydrogen bonds stabilizes the crystal structure and form an infinitive three dimensional lattice. The decomposition reaction takes place in the temperature range 20Ϫ700°C in the static air atmosphere. Scheme 1 Orotic acid (a), Quinoxaline (b)As a part of our going research, in this study, we describe the synthesis, spectral, thermal characterization and crystal structure of the mer-triaquaorotatoquinoxalinecadmium(II) dihydrate, mer-[Cd(HOr)(H 2 O) 3 QX]·2H 2 O (1).

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Section: Introductionmentioning

confidence: 99%

Synthesis, Spectral, Thermal and Structural Characterization of mer‐Triaquaorotatoquinoxaline Cadmium(II) Dihydrate

Yeşılel

Paşaoğlu

Akdağ

et al. 2007

Zeitschrift anorg allge chemie

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“…3 T 1g (F) ( 2 ) and 3 A 2g (F) ! 3 T 1g (P) ( 3 ) transition suggesting high-spin octahedral Ni(II); the band at (29.91-29.00) Â 10 3 cm À1 is from charge transfer [21]. The measured magnetic moments, 3.20-2.99 B.M., fall in the range reported for octahedral.…”

Section: Electronic Spectra Measurementsmentioning

confidence: 68%

“…Participation of the OH group in coordination is further confirmed by the lowering in the phenolic C-O stretch compared to the free ligand. (5) The presence of a broad band at 3500-3360 cm À1 for the solid complexes is associated with stretching modes of coordinated and/or lattice water molecules supported from thermal analysis study [21].…”

Section: Ir Spectra and Mode Of Bondingmentioning

confidence: 81%

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Complexation of 4-amino-1,3 dimethyl-2,6 pyrimidine-dione derivatives with cobalt(II) and nickel(II) ions: synthesis, spectral, thermal and antimicrobial studies

El–Wahab

2008

Journal of Coordination Chemistry

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Four heterocyclic Schiff-base ligands derived from condensation of 4-amino-1,3 dimethyl-2,6 pyrimidine-dione with 2-hydroxybenzaldehyde, 2-methoxybenzaldehyde, 4-hydroxy-3-methoxybenzaldehyde and 4-(dimethylamino) benzaldehyde, (HL 1 , L 2 , HL 3 and L 4 ), respectively, and their Co(II) and Ni(II) complexes have been prepared and characterized via elemental analysis, molar conductance, magnetic moment, thermal and XRPD analysis as well as spectral data (IR, 1 H-NMR, mass and solid reflectance). IR data reveal that the ligands are bidentate neutral ligands except HL 1 , which is monobasic tridentate with coordination sites azomethine (N), carbonyl (O) and phenolic (O). Conductance data suggest that all complexes are nonelectrolytes, except cobalt(II) complexes of L 2 and HL 3 are 1 : 1 electrolytes. The mass spectra confirm the proposed structure of the ligands and their complexes. The solid reflectance spectral data and magnetic moment measurements suggest octahedral, tetrahedral and square planar geometrical structures for the metal complexes. The spectral data were utilized to compute the important ligand field parameters B, and D q ; LFSE also was calculated. The thermal behavior is also studied. Antibacterial and antifungal properties of the ligands and their complexes show broad-spectrum activities and the metal complexes show higher activity than the free ligands.

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“…The incorporation of transition metal ions to form coordination compounds with orotates, the redox, optic, and magnetic properties surely will change 1,2 . Besides, it is biologically important as orotic acid (see figure 1) and it has also an interesting coordination chemistry.…”

Section: Introductionmentioning

confidence: 99%

Study of the Interactions Between Copper(ii) Acetate Monohydrate and Orotic Acid and Orotate Ligands

Seguel¹,

Rivas²,

Paredes³

2010

J. Chil. Chem. Soc.

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Different complexes by reacting copper(II) acetate monohydrate with orotic acid and orotate as ligands were prepared. These compounds were characterized by elemental analysis, spectroscopy, and thermal analysis. It is suggested that in both compounds, the Cu 2 (acetate) 4 suffers the break of both acetate groups by a substitution of orotic or orotate ligands, increasing the Cu-Cu distance. It was corroborated by the magnetic moment values of 1.65 and 1.82 B.M for these compounds.The anion orotato(-1) coordinates through the carboxylic acid and the orotic acid by the oxygen from exocyclic C=O. Semiempirical PM3 calculations for both compounds were also carried out.

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Novel Cobalt(II), Nickel(II) and Copper(II) Complexes of Neutral Orotic Acid. Synthesis, Spectroscopic and Thermal Studies

Cited by 11 publications

References 19 publications

Synthesis, Spectral, Thermal and Structural Characterization of mer‐Triaquaorotatoquinoxaline Cadmium(II) Dihydrate

Synthesis, Spectral, Thermal and Structural Characterization of mer‐Triaquaorotatoquinoxaline Cadmium(II) Dihydrate

Complexation of 4-amino-1,3 dimethyl-2,6 pyrimidine-dione derivatives with cobalt(II) and nickel(II) ions: synthesis, spectral, thermal and antimicrobial studies

Study of the Interactions Between Copper(ii) Acetate Monohydrate and Orotic Acid and Orotate Ligands

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