Synthesis, crystal structures and magnetic properties of transition metal dicyanamide complexes coordinated with pyridyl nitronyl nitroxides

Q. H. Zhao, D. Y. Tang, Liangcheng Du, R. B. Fang

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Abstract

Two novel complexes Ni(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (I) and Zn(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (II) (NITpPy = 2-(p-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide) were synthesized and characterized by infrared spectra, elemental analyses, and UV-Vis techniques. The crystal structures of both complexes have been determined by X-ray diffraction analysis. Both complexes are of centrosymmetric distorted octahedral co-ordination geometry in which metal ions are bound to two dicyanamide anions, two water molecules, and two radicals through the nitrogen atom of pyridine rings and show one-dimensional chain structure via hydrogen bonds. The magnetic properties of complexes I and II were investigated in the temperature range 5-300 K and discussed in detail. The two compounds exhibit weak intermolecular antiferromagnetic interaction. In complex II, the diamagnetic metal zinc just plays the role of a bridge.

Original languageEnglish (US)
Pages (from-to)749-754
Number of pages6
JournalRussian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
Volume33
Issue number10
DOIs
StatePublished - Oct 1 2007

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Metal complexes
Pyridine
Oxides
X ray diffraction analysis
Transition metals
Anions
Metal ions
Zinc
Magnetic properties
Hydrogen bonds
Nitrogen
Negative ions
Crystal structure
Metals
Infrared radiation
Atoms
Molecules
Geometry
Water
Temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "Synthesis, crystal structures and magnetic properties of transition metal dicyanamide complexes coordinated with pyridyl nitronyl nitroxides",
abstract = "Two novel complexes Ni(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (I) and Zn(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (II) (NITpPy = 2-(p-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide) were synthesized and characterized by infrared spectra, elemental analyses, and UV-Vis techniques. The crystal structures of both complexes have been determined by X-ray diffraction analysis. Both complexes are of centrosymmetric distorted octahedral co-ordination geometry in which metal ions are bound to two dicyanamide anions, two water molecules, and two radicals through the nitrogen atom of pyridine rings and show one-dimensional chain structure via hydrogen bonds. The magnetic properties of complexes I and II were investigated in the temperature range 5-300 K and discussed in detail. The two compounds exhibit weak intermolecular antiferromagnetic interaction. In complex II, the diamagnetic metal zinc just plays the role of a bridge.",
author = "Zhao, {Q. H.} and Tang, {D. Y.} and Liangcheng Du and Fang, {R. B.}",
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T1 - Synthesis, crystal structures and magnetic properties of transition metal dicyanamide complexes coordinated with pyridyl nitronyl nitroxides

AU - Zhao, Q. H.

AU - Tang, D. Y.

AU - Du, Liangcheng

AU - Fang, R. B.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - Two novel complexes Ni(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (I) and Zn(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (II) (NITpPy = 2-(p-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide) were synthesized and characterized by infrared spectra, elemental analyses, and UV-Vis techniques. The crystal structures of both complexes have been determined by X-ray diffraction analysis. Both complexes are of centrosymmetric distorted octahedral co-ordination geometry in which metal ions are bound to two dicyanamide anions, two water molecules, and two radicals through the nitrogen atom of pyridine rings and show one-dimensional chain structure via hydrogen bonds. The magnetic properties of complexes I and II were investigated in the temperature range 5-300 K and discussed in detail. The two compounds exhibit weak intermolecular antiferromagnetic interaction. In complex II, the diamagnetic metal zinc just plays the role of a bridge.

AB - Two novel complexes Ni(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (I) and Zn(NITpPy) 2 [N(CN) 2 ] 2 • 2H 2 O (II) (NITpPy = 2-(p-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide) were synthesized and characterized by infrared spectra, elemental analyses, and UV-Vis techniques. The crystal structures of both complexes have been determined by X-ray diffraction analysis. Both complexes are of centrosymmetric distorted octahedral co-ordination geometry in which metal ions are bound to two dicyanamide anions, two water molecules, and two radicals through the nitrogen atom of pyridine rings and show one-dimensional chain structure via hydrogen bonds. The magnetic properties of complexes I and II were investigated in the temperature range 5-300 K and discussed in detail. The two compounds exhibit weak intermolecular antiferromagnetic interaction. In complex II, the diamagnetic metal zinc just plays the role of a bridge.

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