Discrepancy between the structural and magnetic dimensionality in the (μ-terephthalato)bis[(diethylenetriamine)Cu(II)]perchlorate complex

Bakalbassis, Evangelos G.; Tsipis, Constantinos A.; Bozopoulos, A. P.; Dreissig, W.; Hartl, Hans; Mroziński, Jerzy

doi:10.1016/s0020-1693(00)87939-6

Cited by 79 publications

(20 citation statements)

References 15 publications

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“…The complex (2) shows ν as (COO) stretching frequencies at 1648-1643 cm − 1 and ν sym (COO) at 1388-1393 cm − 1 , indicating the existence of carboxylate. The difference between ν as (COO) and ν sym (COO) are about 250-280 cm − 1 , suggesting that the carboxylate groups coordinated to the metal atoms only as monodentate ligands[20]. Electronic spectra of complexes(1)and(3)in methanol solutions exhibit one absorption band in the range 38,314-38,610 cm − 1 , which is assigned to the π-π* transition of the coordinated ligand.…”

mentioning

confidence: 97%

Synthesis, anticancer activities, interaction with DNA and mitochondria of manganese complexes

Chen

Zhou

Huang

et al. 2010

Journal of Inorganic Biochemistry

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mentioning

confidence: 97%

Synthesis, anticancer activities, interaction with DNA and mitochondria of manganese complexes

Chen

Zhou

Huang

et al. 2010

Journal of Inorganic Biochemistry

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“…The structure of the coordination cation is shown in Fig. Each monoclinic cell contains two binuclear cations, [Co 2 (tpha)(phen) 4 (H 2 O) 2 ] 2þ , four non-coordinated NO 3 2 anions, and four non-coordinated C 2 H 5 OH molecules. Figure 2 shows the packing of asymmetric units within the unit cell.…”

Section: Description and Discussion Of Structurementioning

confidence: 99%

Synthesis, Crystal Structure, and Properties of a Binuclear Co(II)‐tpha Complex (tpha = Terephthalate Dianion)

Niu¹,

Jin²,

Yang³

2004

Synthesis and Reactivity in Inorganic and Metal-Organic Chemist

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The binuclear complex [Co 2 (tpha)(phen) 4 (H 2 O) 2 ] . (NO 3 ) 2 . 2C 2 H 5 OH, (tpha ¼ terephthalate dianion; phen ¼ 1,10-phenanthroline) has been synthesized by the reaction of H 2 tpha, phen and Co(NO 3 ) 2 . 6H 2 O in a mixed solvent of DMF/C 2 H 5 OH. Its structure was solved at 296 K. The compound crystallizes in the monoclinic system, space group P2 1 /c:The final agreement factors are R ¼ 0.052 and wR ¼ 0.062. The binuclear entity is centrosymmetric and each Co(II) ion is 6-coordinate, distorted octahedral. The tpha ligand bridges two Co(II) ions in a bismonodentate fashion. The cations and anions are linked through intramolecular hydrogen bonds. The result of the variable temperature 173 ORDER REPRINTS magnetic susceptibility measurement revealed antiferromagnetic interaction between the two Co(II) ions. The analysis of the magnetic data finds: 2J ¼ 2 0.45 cm 21 and g ¼ 1.94. Also, the ESR spectra and the color of the complex markedly vary with temperature. The IR and UV-Vis-NIR spectra of the complex have been determined and assigned.

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“…The values of ν (215 and 216 cm −1 , respectively) indicate that the carboxylate groups coordinate to the Cu(II) atoms only as monodentate ligands [24,25]. The absorption spectra for 1 and 2 exhibit bands at 1446-1585 and 1447-1594 cm −1 associated with pyridine skeleton.…”

Section: Spectroscopic Propertiesmentioning

confidence: 97%

Syntheses, Crystal Structures, and Magnetic Properties of Carboxylate-Bridged Copper(II) Complexes with Bis(2-Pyridylmethyl)Amino Acids

et al. 2005

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Tetradentate Schiff-base carboxylate-containing ligands, bis(2-pyridylmethyl)amino-5-valeric acid (Hpmva) and bis(2-pyridylmethyl)amino-6-caproic acid (Hpmca), react with copper(II) perchlorate to give rise to the carboxylated bridged chain complexes. These complexes have been characterized by X-ray crystallography, spectroscopic, and variable-temperature magnetic susceptibility measurements. In 1 and 2, each of the copper(II) ions exhibit CuN 3 O 2 coordination environments with the three nitrogen atoms of the ligand and one oxygen atom belonging to the carboxylate group of an adjacent molecule occupying the basal position and a water molecule coordinated in the axial position. The electronic spectra of the complexes are significantly affected by the coordination geometry. Magnetic susceptibility measurements indicate that complexes exhibit very weak ferromagnetic interactions.

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Discrepancy between the structural and magnetic dimensionality in the (μ-terephthalato)bis[(diethylenetriamine)Cu(II)]perchlorate complex

Cited by 79 publications

References 15 publications

Synthesis, anticancer activities, interaction with DNA and mitochondria of manganese complexes

Synthesis, anticancer activities, interaction with DNA and mitochondria of manganese complexes

Synthesis, Crystal Structure, and Properties of a Binuclear Co(II)‐tpha Complex (tpha = Terephthalate Dianion)

Syntheses, Crystal Structures, and Magnetic Properties of Carboxylate-Bridged Copper(II) Complexes with Bis(2-Pyridylmethyl)Amino Acids

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