Title of article :
Orientational disorder in the one-dimensional coordination polymer catena-poly[bis(acetylacetonato-κ2O,O′)cobalt(II)]-μ-1,4-diazabicyclo[2.2.2]octane-κ2N1:N4]
Author/Authors :
Dumitru, Florina Faculty of Applied Chemistry and Materials Science - University Politehnica of Bucharest, Romania , Englert, Ulli Institute of Inorganic Chemistry - RWTH Aachen University, Germany , Braun, Beatrice Institute of Chemistry - Humboldt University of Berlin, Germany
Abstract :
The title compound, [Co(C5H7O2)2(C6H12N2)]n, was obtained as a one-dimensional coordination polymer from bis(acetylacetonato)diaquacobalt(II), [Co(acac)2(OH2)2], and 1,4-diazabicyclo[2.2.2]octane (DABCO), a diamine with good bridging ability and rod-like spacer function. In the chain complex that extends along the c axis, the CoII atom is six-coordinated, the O-donor atoms of the chelating acac ligands occupying the equatorial positions and the bridging DABCO ligands being in trans-axial positions. In the crystal structure, the DABCO ligand is conformationally disordered in a 50:50 manner as a result of its location across a crystallographic mirror plane. The metal–metal distance is very close to that in a related compound exhibiting weak antiferromagnetic exchange between the CoII ions, and the title compound can thus be useful for obtaining more information about the contribution of different bridges to the magnetic coupling between paramagnetic ions.
Keywords :
crystal structure , magnetic behaviour , cobalt(II) , one-dimensional coordination polymer , acetylacetonate complexes , orientational disorder
Journal title :
Acta Crystallographica Section E: Crystallographic Communications
