Synthesis and Characterization of Cr(III), Mn(II), Co(II), Ni(II), and Cu(II) Complexes with a Hexadentate Hemi-Cage Ligand Formed with Bipyridine
A series of transition metal complexes, Cr(III), Mn(II), Co(II), Ni(II), and Cu(II), have been prepared and characterized using the hemi-cage ligand previously reported by Beeston et al. [R.F. Beeston, W.S. Aldridge, J.A. Treadway, M.C. Fitzgerald, B.A. Degraff, S.E. Stitzel. Inorg. Chem., 37, 4368 (1998)]. The ligand is composed of three bipyridyl groups covalently bound to a central benzene ring through ethyl groups. Preliminary DFT calculation with Cr(III) indicates that the ligand will allow the three bipyridyl groups to coordinate to a metal with a pseudooctahedral coordination geometry. Comparison of UV-Vis spectra, magnetic susceptibility, and cyclic voltammetry indicates that the complexes are remarkably similar to the corresponding bipyridine complexes, M(bpy) . No evidence was found to indicate that the ligand restricts the motion of the bipyridyl groups enough to change the chemical properties. © 2011 Taylor & Francis.
Journal of Coordination Chemistry
Williams, A. L., Bhuiyan, A. A., Turner, M. O., Millett, F., & Durham, B. (2011). Synthesis and characterization of Cr (III), Mn (II), Co (II), Ni (II), and Cu (II) complexes with a hexadentate hemi-cage ligand formed with bipyridine. Journal of Coordination Chemistry, 64(1): 48-56.