Synthesis, spectroscopy, crystal structure and magnetism of tetrakis(2-aminopyrimidine)bis(μ-methoxo)bis(perchlorato)dicopper(II): a rare case of distortion isomerism

Albada, Gerard A. van; Mutikainen, Ilpo; Turpeinen, Urho; Reedijk, Jan

doi:10.1016/j.poly.2003.12.019

Cited by 23 publications

(7 citation statements)

References 40 publications

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“…Pyridine and pyridine derivatives have proven to be suitable compounds that can aid in the formation of packing structures by the addition of different substituents to the ring [7][8][9]. Substituent position on the ring is also important as it affects hydrogen bond formation and other intermolecular interactions [10].…”

Section: Introductionmentioning

confidence: 99%

Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)₂CuX₂ and (3,5-FCAPH)₂CuX₄

Solomon

Landee

Turnbull

et al. 2014

Journal of Coordination Chemistry

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Using 2-amino-5-chloro-3-fluoropyridine, two new copper halide coordination complexes and two new salts have been synthesized: [(3,5-FCAP) 2 CuCl 2 ] (1), [(3,5-FCAP) 2 CuBr 2 ](2), (3,5-FCAPH) 2 (3) and (3,5-FCAPH) 2 [CuBr 4 ] (4) [3,5-FCAP = 2-amino-5-chloro-3-fluoropyridine; 3,5-FCAPH = 2-amino-5-chloro-3-fluoropyridinium]. These complexes have been analyzed throughThe reaction of 2-amino-5-chloro-3-fluoropyridine (3,5-FCAP) with copper(II) halides in neutral or acidic media gave the complexes (3,5-FCAP) 2 CuX 2 and (3,5-FCAPH) 2 CuX 4 (X = Cl, Br). Variable temperature magnetic susceptibility reveals anti-ferromagnetic interactions, J, ranging from −0.9 to −31.3 K.single-crystal X-ray diffraction and temperature-dependent magnetic susceptibility. Compounds 1 and 2 crystallize in the triclinic space group P-1, while 3 and 4 crystallize in the monoclinic space group P2 1 /c. All structures were distinct, with 1 giving a bihalide bridged chain, 2 yielding a halide bridged dimer, 3 forming a two-halide bridged chain via short Cl⋅⋅⋅Cl contacts, and 4 producing a rectangular sheet via short Br⋅⋅⋅Br contacts. All four compounds exhibit anti-ferromagnetic interactions and were fit to linear chain (1 and 3), dimer (2), and rectangular 2-D sheet (4) models. The resulting J/k B values are −3.4(1), −31.3(8), −0.9(1), and −9.46(6) K with an α value (α = Jʹ/J) of 0.06(2), respectively.

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Section: Introductionmentioning

confidence: 99%

Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)₂CuX₂ and (3,5-FCAPH)₂CuX₄

Solomon

Landee

Turnbull

et al. 2014

Journal of Coordination Chemistry

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“…Other workers have found that "semi-coordination" for perchlorate occurs at 2.695(1) and 2.807(1) Å for similar geometry in a trinuclear copper complex [34] and at 2.82 Å for a tetragonal amine complex [35]. The Cu-O separation in 4 is longer than those found for some five-coordinate amide complexes with perchlorate in the apical position (2.443(3) and 2.528(6) Å) [36,37] but the longer metal-anion distance would be consistent with the presence of two perchlorate anions in the tetragonally-elongated coordination sphere. There is no hydrogen-bonding between the copper complex units in the lattice.…”

Section: Synthesis and Characterizationmentioning

confidence: 94%

Metal complexes of 3-thiophene carboxamides containing a pyridine ring

Howell

Day

Noftle

2007

Inorganica Chimica Acta

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Complexes of Zn(II), Cu(II) and Co(II) with either N-(2-methylpyridyl)-3-thienyl-alkylcarboxamide or N-(2-pyridyl)-3-thienylalkyl-carboxamide groups have been prepared and characterized. Crystal structures of ten new complexes are reported and discussed. N-(2-Methylpyridyl)-3-thienyl-alkyl-carboxamide exhibits both uni-and bidentate behavior. With all ligands, bidentate complexation is through the carbonyl oxygen and pyridine nitrogen atoms (O, N) and the amide nitrogen atom remains protonated. The electrochemical behavior and the infrared spectra of selected complexes are discussed.

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“…With other anions like sulphate [7], triflate [8], nitrate [9] and dicyanamide [10], mononuclear or polynuclear Cu(II) compounds are obtained, all with ampym acting as a monodentate ligand. X-ray structures of a dinuclear methoxido-bridged Cu(II) [1,11] and a hydroxido-bridged Cu(II) compound [12] were also obtained, again with ampym acting as a monodentate ligand. With tetrafluoridoborate as an anion surprisingly a very complicated trinuclear-based polymeric structure was obtained [13].…”

Section: Introductionmentioning

confidence: 94%

“…The ligand used in this study, 2-aminopyrimidine (abbreviated as ampym), is of particularly interest for structural and magnetic studies of metal complexes and has been of interest, specially for Cu(II) compounds [1,2]. Different Cu(II) compounds with ampym were investigated by X-ray crystallography depending on the nature of the anion and the synthetic method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure and Spectroscopy of catena-poly-bis(azido-N1,N1)(2-Aminopyrimidine)Copper(II)

et al. 2008

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The compound [Cu(ampym)(l 1,1 -N 3 ) 2 ] n (ampym = 2-aminopyrimidine) has been synthesized and characterized by X-ray crystallography and infrared spectroscopy. In addition, Ligand Field and powder EPR measurements have been performed. The structure is solved in space group P21/c with a = 7.303(2), b = 19.716(4), c = 5.949(1) Å , b = 98.17(3), V = 847.9(3) Å 3 , Z = 2 with final R = 0.0382. The coordination geometry around the Cu(II) ion is distorted square pyramidal, with four nitrogen atoms of four bridging azido anions in the basal plane with Cu-N distances that range from 1.998(3) to 2.069(3) Å . The apical position is occupied by a nitrogen atom of the ampym molecule at a Cu-N distance of 2.169(3) Å . The trans-basal angles are 165.7(1) and 143.9(1)°. Weak hydrogen bonding is observed between the two amine hydrogen atoms and nitrogen of an azide anion and the pyrimidine-ring nitrogen atom of a neighbouring molecule (NÁÁÁN distances 3.174(5), 3.106(4) Å ). These last hydrogen bonds (N7ÁÁÁN3) are forming so-called ''WatsonCrick type'' hydrogen bonds. In the infrared the vibrations of the coordinated azide anion are observed at 2,062, 1,273 and 655 cm -1 , while the Cu-N vibrations are observed at 370 and 224 cm -1 . Ligand-field and EPR spectra are uneventful and give spectral parameters expected in the range for such Cu(II) compounds. Magnetic susceptibility measurements reveal a weak antiferromagnetic interaction between the Cu(II) ions.

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Synthesis, spectroscopy, crystal structure and magnetism of tetrakis(2-aminopyrimidine)bis(μ-methoxo)bis(perchlorato)dicopper(II): a rare case of distortion isomerism

Cited by 23 publications

References 40 publications

Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)₂CuX₂ and (3,5-FCAPH)₂CuX₄

Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)₂CuX₂ and (3,5-FCAPH)₂CuX₄

Metal complexes of 3-thiophene carboxamides containing a pyridine ring

Synthesis, Crystal Structure and Spectroscopy of catena-poly-bis(azido-N1,N1)(2-Aminopyrimidine)Copper(II)

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Synthesis, spectroscopy, crystal structure and magnetism of tetrakis(2-aminopyrimidine)bis(μ-methoxo)bis(perchlorato)dicopper(II): a rare case of distortion isomerism

Cited by 23 publications

References 40 publications

Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)2CuX2 and (3,5-FCAPH)2CuX4

Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)2CuX2 and (3,5-FCAPH)2CuX4

Metal complexes of 3-thiophene carboxamides containing a pyridine ring

Synthesis, Crystal Structure and Spectroscopy of catena-poly-bis(azido-N1,N1)(2-Aminopyrimidine)Copper(II)

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Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)₂CuX₂ and (3,5-FCAPH)₂CuX₄

Copper(II) complexes of 2-amino-5-chloro-3-fluoropyridine: syntheses and magnetic properties of (3,5-FCAP)₂CuX₂ and (3,5-FCAPH)₂CuX₄