Synthesis, structure and properties of aquabis(2,4′-bipyridine)di(propionato-O)copper(II)

Kruszyński, Rafał; Kuznik, B.; Bartczak, Tadeusz J.; Czakis-Sulikowska, D.

doi:10.1080/00958970512331325485

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…The mononuclear Cu(1H)(ClO 4 ) 2 complex yielded two isomeric solid state structures, 6 and 7, which contained a Cu(II) ion in a elongated tetragonal octahedral geometry and a distorted square pyramidal geometry, respectively. The peak at 657 nm was typical for Cu(II) in a distorted square pyramidal environment, 41,47 but it also fell within the wide range of values for tetragonally distorted octahedral Cu(II) geometries. Thus, the stereochemistries of the Cu(II) ion in solution could not be ascertained.…”

Section: Comparison Of the Ligand And Its Metal Complexesmentioning

confidence: 85%

Control of Self-Assembly through the Influence of Terminal Hydroxymethyl Groups on the Metal Coordination of Pyrimidine−Hydrazone Cu(II) Complexes

2010

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The synthesis and characterization of 6-hydroxymethylpyridine-2-carboxaldehyde (2-methyl-pyrimidine-4,6-diyl)bis(1-methylhydrazone) (1) is reported. Ligand 1 was designed as a ditopic pyrimidine-hydrazone molecular strand with hydroxymethyl groups attached to the terminal pyridine rings. Coordination of 1 with Cu(ClO(4))(2) x 6 H(2)O or Cu(SO(3)CF(3))(2) x 4 H(2)O in a 1:2 molar ratio resulted in the dinuclear Cu(II) complexes [Cu(2)1(CH(3)CN)(4)](ClO(4))(4) x CH(3)CN (4) and [Cu(2)1(SO(3)CF(3))(2)(CH(3)CN)(2)](SO(3)CF(3))(2) x CH(3)CN (5). X-ray crystallography and (1)H NMR NOESY experiments showed that 1 adopted a horseshoe shape with both pyrimidine-hydrazone (pym-hyz) bonds in a transoid conformation, while 4 and 5 were linear in shape, with both pym-hyz bonds in a cisoid conformation. Coordination of 1 with Cu(ClO(4))(2) x 6 H(2)O or Cu(SO(3)CF(3))(2) x 4 H(2)O in a 1:1 molar ratio resulted in three different bent complexes, [Cu(1H)(ClO(4))(2)](ClO(4)) (6), [Cu(1H)(CH(3)CN)](ClO(4))(3) x 0.5 H(2)O (7), and [Cu1(SO(3)CF(3))](2)(SO(3)CF(3))(2) x CH(3)CN (8), where the pym-hyz bond of the occupied coordination site adopted a cisoid conformation, while the pym-hyz bond of the unoccupied site retained a transoid conformation. Both 6 and 7 showed protonation of the pyridine nitrogen donor in the empty coordination site; complex 8, however, was not protonated. A variety of Cu(II) coordination geometries were seen in structures 4 to 8, including distorted octahedral, trigonal bipyramidal, and square pyramidal geometries. Coordination of the hydroxymethyl arm in the mononuclear Cu(II) complexes 6, 7, and 8 appeared to inhibit the formation of a [2 x 2] grid by blocking further access to the Cu(II) coordination sphere. In addition, the terminal hydroxymethyl groups contributed to the supramolecular structures of the complexes through coordination to the Cu(II) ions and hydrogen bonding.

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Section: Comparison Of the Ligand And Its Metal Complexesmentioning

confidence: 85%

Control of Self-Assembly through the Influence of Terminal Hydroxymethyl Groups on the Metal Coordination of Pyrimidine−Hydrazone Cu(II) Complexes

2010

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“…Furthermore, the second peak was asymmetrical in This journal is © The Royal Society of Chemistry 2014 nature with a small shoulder suggesting the Cu(II) ion was five coordinate possibly square pyramidal or Jahn-Teller distorted octahedral geometry. 22,[31][32][33] X-Ray structural analysis of 3 showed it crystallized in the monoclinic space group P2 1 /n forming a 1D mixed-valence infinite double chain along the c axis. The asymmetric unit contained two L 24 entities of which one was deprotonated, one Cu(I) cation, one Cu(II) cation, two I − anions and one MeCN solvent molecule.…”

Section: Resultsmentioning

confidence: 99%

“…[Cu(L 33 )I] ∞ , 4. CuI (49 mg, 0.26 mmol) dissolved in CH 3 CN (10 mL) was added to L 33 (52 mg, 0.26 mmol) dissolved in CH 3 OH (10 mL).…”

Section: Synthesesmentioning

confidence: 99%

“…1,2 In comparison, Cu(II) iodide structures are rare, 3 and dominated by Jahn-Teller elongated Cu-I bonds, which often bridge to form coordination polymers. 4 Given the wide range of structures available for copper iodide complexes, we prepared coordination polymer architectures using the versatile four isomeric ligands, 2,3-, 2,4-, 3,3′-and 4,4′-dipyridyl ketone oxime (L 23 , L 24 , L 33 and L 44 respectively) (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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Use of the oxime–oximato binding mode to stabilise mixed valence copper iodide polymer networks using dipyridyl ketone oxime ligands

2014

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“…2,4 0 -Bipyridine (2,4 0 -bpy) is very interesting organic ligand because of its different possibility to coordinate with central ion. This N-donor may coordinate in two ways: as a monodentate ligand by 4 0 (N) nitrogen atom [8][9][10][11][12][13] and bidentate bridging by both nitrogens as heteronuclear and as bifunctional N-donor [14][15][16][17]. The publications with 2,4 0bpy only describe the coordination compounds of d-block elements.…”

Section: Introductionmentioning

confidence: 99%

Analytical and thermal investigations of new solid Y(III) and La(III) complexes

Czylkowska

Raducka

Mierczyński

et al. 2018

J Therm Anal Calorim

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New compounds with formulae Y(2,4 0-bpy) 1.5 Cl 3 Á8H 2 O (I), Y(2,4 0-bpy) 0.5 Br 3 Á8H 2 O (II), La(2,4 0-bpy)Cl 3 Á5H 2 O (III) and La(2,4 0-bpy) 1.5 Br 3 Á5H 2 O (IV) were prepared and characterized by chemical and elemental analysis, IR spectroscopy and powder X-ray diffraction. The thermal properties of compounds in the solid state were studied using TG-DTA techniques under dry air atmosphere. The thermal behavior of investigated compounds was studied in the temperature range 298-1273 K. They are stable up to 323 K. The complexes decompose in several stages, accompanied by endo-and exothermic effects. In all cases, the first step of pyrolysis is partial or total dehydration. When the temperature rises, deamination takes place. The solid final products of decomposition are Y 2 O 3 and La 2 O 3 , respectively. Additionally, for all complexes mass spectrometry was used to analyze principal volatile thermal decomposition and fragmentation products evolved during pyrolysis under dry air atmosphere. Keywords Y(III) and La(III) complexes Á 2,4 0-Bipyridine Á TG-DTA Á Mass spectra & Agnieszka Czylkowska

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Synthesis, structure and properties of aquabis(2,4′-bipyridine)di(propionato-O)copper(II)

Cited by 15 publications

References 12 publications

Control of Self-Assembly through the Influence of Terminal Hydroxymethyl Groups on the Metal Coordination of Pyrimidine−Hydrazone Cu(II) Complexes

Control of Self-Assembly through the Influence of Terminal Hydroxymethyl Groups on the Metal Coordination of Pyrimidine−Hydrazone Cu(II) Complexes

Use of the oxime–oximato binding mode to stabilise mixed valence copper iodide polymer networks using dipyridyl ketone oxime ligands

Analytical and thermal investigations of new solid Y(III) and La(III) complexes

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