Spectral properties and bio-activity of copper(II) clofibriates, part III: crystal structure of Cu(clofibriate)2(2-pyridylmethanol)2, Cu(clofibriate)2(4-pyridylmethanol)2(H2O) dihydrate, and Cu2(clofibriate)4(N,N-diethylnicotinamide)2

Moncóľ, Ján; Kaliňáková, Barbora; Švorec, Jozef; Kleinova, M.; Koman, Marián; Hudecová, Daniela; Melnı́k, Milan; Mazúr, Milan; Valko, Marián

doi:10.1016/j.ica.2004.03.043

Cited by 44 publications

(22 citation statements)

References 71 publications

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“…The monodentate bonding mode of the dena ligand is even more dominant for carboxylatocopper(II) complexes and there are two main stoichiometries within this group of complexes with the dena ligand. The 1:1 stoichiometry is found in paddle-wheel dinuclear complexes type [Cu 2 (RCOO) 4 (dena) 2 ] [12, [26][27][28]. The most frequent 1:2 stoichiometry can be found in monomeric complexes of Cu(RCOO) 2 (dena) 2 (H 2 O) x , where x = 0, [29,30], x = 2 [18,[31][32][33][34][35], or x = 4 [36], and in all those complexes the dena molecules are monodentate N donor ligands.…”

Section: Introductionmentioning

confidence: 99%

[Cu(X-salicylato)2(N,N-diethylnicotinamide)2(H2O)2] complexes: conformational polymorphism and its consequence in supramolecular hydrogen-bonding networks formation

et al. 2010

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Novel copper(II) X-salicylate complexes with N,N-diethylnicotinamide (dena) of the formula [Cu(R-COO) 2 (dena) 2 (H 2 O) 2 ] (RCOO = 3-methylsalicylate anion (3-Mesal, 1), 4-methylsalicylate anion (4-Mesal, 2), 5-methylsalicylate anion (5-Mesal, 3), 5-methoxysalicylate anion (5-MeOsal, 4) or 4-methoxysalicylate anion (4-MeOsal, 5)), and complex (6)) have been prepared in the crystalline forms and characterized by spectroscopic methods (IR, Vis-UV, EPR). All the compounds according to their composition (1-5) seem to possess octahedral copper(II) stereochemistry. The complex 1 has been prepared in two different forms. X-ray analyses of the complexes 1, 4, and 5 were carried out and they featured a tetragonal-bipyramidal geometry around the copper atoms. The tetragonal planes are created by X-salicylate anions bonded to the copper(II) atoms via unidentate carboxylate oxygen atoms and the pyridine ring nitrogen atoms of the neutral ligand N,N-diethylnicotinamide, while in axial positions are water molecules. The two forms of complex 1 present conformation polymorphs and supramolecular isomers.

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Section: Introductionmentioning

confidence: 99%

[Cu(X-salicylato)2(N,N-diethylnicotinamide)2(H2O)2] complexes: conformational polymorphism and its consequence in supramolecular hydrogen-bonding networks formation

et al. 2010

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“…4) (6) O1-Cu1-N2: 100.51 (7) O2-Cu1-N2: 98.22 (7) N1-Cu1-N2: 175.62 (8) N1-Cu1-O5: 86.21 (7) N2-Cu1-O5: 89.74 (7) O3 i -Cu1-N2: 86.32 (7) O5-Cu1-O3 i : 169.05 (6) O1-Cu1-O3 i : 87.96 (7) N1-Cu1-O3 i : 97.96 (7) Hydrogen (2), the 4-hymp does not act as a bridging ligand between the nickel(II) ions. Generally, the 4-hymp is coordinated to metal ions through the nitrogen atom, forming the mononuclear metal complexes [23][24][25][26][27].…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, 4-hydroxymethyl pyridine is a drug metabolite of ethionamide and isofamide, these drugs of second-line therapy are used for the treatment of multidrug-resistant tuberculosis [22]. Only a few structures of metal complexes with 4-hydroxymethyl pyridine have been reported [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Polymeric and monomeric dipicolinate complexes with 4-hydroxymethyl pyridine: spectral, structural, thermal and electrochemical characterization

Uçar

Bulut

et al. 2009

Struct Chem

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Polymeric copper(II), [Cu(l-dpc)(l-4-hymp)] n (1), and monomeric nickel(II), [Ni(dpc)(4-hymp)(H 2 O) 2 ]Á H 2 O (2), (dpc: dipicolinate, 4-hymp: 4-hydroxymethyl pyridine), dipicolinate complexes have been prepared and characterized by spectroscopic (IR, UV-Vis, EPR), thermal (TG/DTA), X-ray diffraction technique and electrochemical methods. In both the dipicolinate complexes, the dpc dianion acts as a tridentate ligand. In polymeric copper(II) complex, the 4-hymp and dpc ligands adopt a bridging position between the Cu(II) centers, forming the elongated octahedral geometry. The polymeric chains are linked to one another via O-HÁÁÁO hydrogen bond interactions, forming the 3-D polymeric structure. The Ni(II) ion is bonded to dpc ligand through pyridine N atom together with one O atom of each carboxylate group, two aqua ligands and N pyridine atom of 4-hymp, forming the distorted octahedral geometry. The Ni(II) complexes are connected to one another via O-HÁÁÁO hydrogen bonds, forming R 4 2 (18) motifs in 2-D pattern. The powder EPR spectra of copper(II) complex have indicated that the paramagnetic center is in rhombic symmetry with the Cu 2? ion having distorted octahedral geometry. IR and UV-Vis spectroscopes all agree with the observed crystal structure.

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“…It is noted, that a few coordination compounds with this ligand were recently reported, which showed only coordination by the pyridine N atom except for two different metal complexes [48][49][50][51][52][53]. In the case of a copper(II)dipiconilate-4-(hydroxymethyl)pyridine coordination compound, the Cu(II) cations are linked by 4-(hydroxymethyl)pyridine ligands into chains, which was also observed in Ni(NCS) 2 (4-(hydroxymethyl)pyridine) 2 [53,54].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structures and Properties of Cobalt Thiocyanate Coordination Compounds with 4-(hydroxymethyl)pyridine as Co-ligand

et al. 2016

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Abstract:Reaction of Co(NCS) 2 with 4-(hydroxymethyl)pyridine (hmpy) leads to the formation of six new coordination compounds with the composition [Co(NCS) 2 (hmpy) (4) and [Co(NCS) 2 (hmpy) 2 ] n (5). They were characterized by single crystal and powder X-ray diffraction experiments, thermal and elemental analysis, IR and magnetic measurements. Compound 1 and 1-H 2 O form discrete complexes, in which the Co(II) cations are octahedrally coordinated by two terminal thiocyanato anions and four 4-(hydroxymethyl)pyridine ligands. Discrete complexes were also observed for compounds 2 and 3 where two of the hmpy ligands were substituted by solvent, either water (3) or ethanol (2). In contrast, in compounds 4 and 5, the Co(II) cations are linked into chains by bridging 4-(hydroxymethyl)pyridine ligands. The phase purity was checked with X-ray powder diffraction. Thermogravimetric measurements showed that compound 3 transforms into 5 upon heating, whereas the back transformation occurs upon resolvation. Magnetic measurements did not show any magnetic exchange via the hmpy ligand for compound 5.

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Spectral properties and bio-activity of copper(II) clofibriates, part III: crystal structure of Cu(clofibriate)2(2-pyridylmethanol)2, Cu(clofibriate)2(4-pyridylmethanol)2(H2O) dihydrate, and Cu2(clofibriate)4(N,N-diethylnicotinamide)2

Cited by 44 publications

References 71 publications

[Cu(X-salicylato)2(N,N-diethylnicotinamide)2(H2O)2] complexes: conformational polymorphism and its consequence in supramolecular hydrogen-bonding networks formation

[Cu(X-salicylato)2(N,N-diethylnicotinamide)2(H2O)2] complexes: conformational polymorphism and its consequence in supramolecular hydrogen-bonding networks formation

Polymeric and monomeric dipicolinate complexes with 4-hydroxymethyl pyridine: spectral, structural, thermal and electrochemical characterization

Synthesis, Structures and Properties of Cobalt Thiocyanate Coordination Compounds with 4-(hydroxymethyl)pyridine as Co-ligand

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