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Preparation, characterization and X-ray analysis of [Co2(Cl)2tpmc](BF4)2. Comparative structural analysis with the complexes having analogous geometries and ligands
A novel binuclear Co(II) complex, [Co2(Cl)2tpmc](BF4)2 (tpmc = N,N′,N″,N‴-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraaz acyclotetradecane), was prepared and structurally characterized by X-ray diffraction analysis at low temperature. The complex crystallizes in P21/c space group of the monoclinic crystal system, and its crystals are isomorphic with those of [Cu2(Br)2tpmc](ClO4)2 complex. In the crystal structure the complex cations [Co2(Cl)2tpmc]2+ are settled around the inversion centres. Cobalt(II) is exo coordinated with four macrocyclic N atoms, and Cl- supplements the fifth coordination site. Based on the index of trigonality, the coordination polyhedron formed around Co(II) ion is described as distorted trigonal bipyramid. Two metal centres are at a distance of 5.710 Å. This is the first Co(II) complex for which X-ray analysis confirmed a chair conformation of tpmc ligand. IR, EPR (X-band) and UV/VIS absorption and reflectance spectra, molar conductivities and magnetic measurements ...(SQUID) are used to study the investigated complex. A comparative structural analysis with some of the described Co(II) and Cu(II) complexes of analogous geometries and type of pendant azamacrocyclic ligands was also done.
Keywords:
Chloro ligand / Co(II) dimeric complex / Magnetic properties / Pendant azamacrocycles / X-ray analysis
Source:
Journal of Molecular Structure, 2007, 827, 1-3, 80-87
TY - JOUR
AU - Vučković, Gordana
AU - Tanasković, Slađana B.
AU - Rychlewska, Urszula
AU - Radanović, Dušanka
AU - Mroziñski, Jerzy
AU - Korabik, Maria
PY - 2007
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4250
AB - A novel binuclear Co(II) complex, [Co2(Cl)2tpmc](BF4)2 (tpmc = N,N′,N″,N‴-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraaz acyclotetradecane), was prepared and structurally characterized by X-ray diffraction analysis at low temperature. The complex crystallizes in P21/c space group of the monoclinic crystal system, and its crystals are isomorphic with those of [Cu2(Br)2tpmc](ClO4)2 complex. In the crystal structure the complex cations [Co2(Cl)2tpmc]2+ are settled around the inversion centres. Cobalt(II) is exo coordinated with four macrocyclic N atoms, and Cl- supplements the fifth coordination site. Based on the index of trigonality, the coordination polyhedron formed around Co(II) ion is described as distorted trigonal bipyramid. Two metal centres are at a distance of 5.710 Å. This is the first Co(II) complex for which X-ray analysis confirmed a chair conformation of tpmc ligand. IR, EPR (X-band) and UV/VIS absorption and reflectance spectra, molar conductivities and magnetic measurements (SQUID) are used to study the investigated complex. A comparative structural analysis with some of the described Co(II) and Cu(II) complexes of analogous geometries and type of pendant azamacrocyclic ligands was also done.
PB - Elsevier
T2 - Journal of Molecular Structure
T1 - Preparation, characterization and X-ray analysis of [Co2(Cl)2tpmc](BF4)2. Comparative structural analysis with the complexes having analogous geometries and ligands
VL - 827
IS - 1-3
SP - 80
EP - 87
DO - 10.1016/j.molstruc.2006.05.009
ER -
@article{
author = "Vučković, Gordana and Tanasković, Slađana B. and Rychlewska, Urszula and Radanović, Dušanka and Mroziñski, Jerzy and Korabik, Maria",
year = "2007",
abstract = "A novel binuclear Co(II) complex, [Co2(Cl)2tpmc](BF4)2 (tpmc = N,N′,N″,N‴-tetrakis(2-pyridylmethyl)-1,4,8,11-tetraaz acyclotetradecane), was prepared and structurally characterized by X-ray diffraction analysis at low temperature. The complex crystallizes in P21/c space group of the monoclinic crystal system, and its crystals are isomorphic with those of [Cu2(Br)2tpmc](ClO4)2 complex. In the crystal structure the complex cations [Co2(Cl)2tpmc]2+ are settled around the inversion centres. Cobalt(II) is exo coordinated with four macrocyclic N atoms, and Cl- supplements the fifth coordination site. Based on the index of trigonality, the coordination polyhedron formed around Co(II) ion is described as distorted trigonal bipyramid. Two metal centres are at a distance of 5.710 Å. This is the first Co(II) complex for which X-ray analysis confirmed a chair conformation of tpmc ligand. IR, EPR (X-band) and UV/VIS absorption and reflectance spectra, molar conductivities and magnetic measurements (SQUID) are used to study the investigated complex. A comparative structural analysis with some of the described Co(II) and Cu(II) complexes of analogous geometries and type of pendant azamacrocyclic ligands was also done.",
publisher = "Elsevier",
journal = "Journal of Molecular Structure",
title = "Preparation, characterization and X-ray analysis of [Co2(Cl)2tpmc](BF4)2. Comparative structural analysis with the complexes having analogous geometries and ligands",
volume = "827",
number = "1-3",
pages = "80-87",
doi = "10.1016/j.molstruc.2006.05.009"
}
Vučković, G., Tanasković, S. B., Rychlewska, U., Radanović, D., Mroziñski, J.,& Korabik, M.. (2007). Preparation, characterization and X-ray analysis of [Co2(Cl)2tpmc](BF4)2. Comparative structural analysis with the complexes having analogous geometries and ligands. in Journal of Molecular Structure
Elsevier., 827(1-3), 80-87.
https://doi.org/10.1016/j.molstruc.2006.05.009
Vučković G, Tanasković SB, Rychlewska U, Radanović D, Mroziñski J, Korabik M. Preparation, characterization and X-ray analysis of [Co2(Cl)2tpmc](BF4)2. Comparative structural analysis with the complexes having analogous geometries and ligands. in Journal of Molecular Structure. 2007;827(1-3):80-87.
doi:10.1016/j.molstruc.2006.05.009 .
Vučković, Gordana, Tanasković, Slađana B., Rychlewska, Urszula, Radanović, Dušanka, Mroziñski, Jerzy, Korabik, Maria, "Preparation, characterization and X-ray analysis of [Co2(Cl)2tpmc](BF4)2. Comparative structural analysis with the complexes having analogous geometries and ligands" in Journal of Molecular Structure, 827, no. 1-3 (2007):80-87,
https://doi.org/10.1016/j.molstruc.2006.05.009 . .
