Crystal and Molecular Structure of Aquadibromo[2-(2-pyridyl)quinolinyl]manganese(II), and the Relation Between Structure and Magnetic Properties of Manganese(II) Complexes
The crystal and molecular structure of the title complex has been determined by heavy-atom techniques. Crystal are monoclinic, a = 8.172(3), b = 11.868(4), c = 16.456(5)Å, β = 98.83(4) °, space group P21/c. The structure was refined by least squares to R 8% for 1 577 reflections measured by diffractometer. The complex consists of well-isolated units of five-co-ordinated MnII molecules, permitting no significant magnetic exchange interaction between neighbouring paramagnetic centres. Comparison with a related structure [Mn2(biq)2Cl4] (biq = 2.2′-biquinolyl) indicates that the presence of the co-ordinated water molecule (Mn-O 2.27 Å) prevents dimerisation of the complex via bromide bridges. The MnN2X2 (X = Br or Cl) chromophore in this type of complex seeks out an extra ligand to become distorted trigonal bipyramidal five-co-ordinate.
R. J. Butcher and E. Sinn, "Crystal and Molecular Structure of Aquadibromo[2-(2-pyridyl)quinolinyl]manganese(II), and the Relation Between Structure and Magnetic Properties of Manganese(II) Complexes," Journal of the Chemical Society, Dalton Transactions, Royal Society of Chemistry, Jan 1976.
The definitive version is available at http://dx.doi.org/10.1039/DT9760001186
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© 1976 Royal Society of Chemistry, All rights reserved.