12348-69-5Relevant articles and documents
Zero-field splitting in tetracoordinate Co(II) complexes
Idesicova,Dlhan,Moncol,Titis,Boca
, p. 79 - 84 (2012)
Mononuclear Co(II) complexes of the [CoCl2L2] family, with L being a heterocyclic N-donor ligand, were subjected to magnetochemical investigation. The temperature dependence of the magnetic susceptibility and the field dependence of the magnetization have been analyzed simultaneously in terms of the spin Hamiltonian formalism. The magnetic parameters obtained by a fitting procedure show a considerable magnetic anisotropy measured by the g-factor difference and the zero-field splitting parameter 2D, that splits the ground term 4B1(D2d) and/or 4A 2(C2v).
Synthesis of cationic cobalt(II) complexes and their efficiency as catalysts for the polymerization of 1,3-butadiene
Liu, Li,Zhang, Xu,Liu, Heng,Zhang, Xuequan,Sun, Guangping,Zhang, Hexin
, p. 8 - 14 (2014)
1 A series of novel cationic cobalt(II) compounds accompanied by various counter ions ([BF4]-, [PF6] -, [SbF6]-) and N-bearing ligands (1,10-phenanthroline, bipyridine, benzimidazole, and imidazole) were synthesized. Neutral compounds, CoCl2-nLigands, were prepared as reference compounds. All the compounds were characterized using IR spectral analysis and elemental analysis and some of the compounds were further characterized by single-crystal X-ray diffraction analysis. The synthesized compounds were evaluated as precursors for butadiene polymerization in conjunction with ethylaluminum sesquichloride as a cocatalyst, and the polymerization mechanism was proposed to involve anionic coordination polymerization. The active centers of the catalysts were cationic in nature, and the catalytic activities were affected by the electronegativity of the counter ion.
