Benign synthesis of carboxamide ligands, H2Me2bqb and H2Me2bpb. Preparation, characterization and electrochemistry of Ni(II) complexes: The crystal structure of [NiII(Me2bqb)]
摘要:
A novel and highly efficient approach for the synthesis of H(2)Me(2)bqb and H(2)Me(2)bpb using ionic liquid as an environmentally benign reaction medium has been developed, eliminating the need for the pyridine as a toxic solvent. The Ni(II) complex of the dianionic ligand Me(2)bqb(2-), [Me(2)bqb(2-) = 1,2-bis(quinoline-2-carboxamide)-4,5-dimethyl-benzene dianion], has been synthesized and characterized by elemental analyses and spectroscopic methods, and the crystal and molecular structure of [Ni(Me(2)bqb)] (1), has been determined by X-ray crystallography. The complex exhibits distorted square-planar NiN4 coordination geometry with two short and two long Ni-N bonds (Ni-N similar to 1.85 and similar to 1.96 angstrom, respectively). The electrochemical behavior of [Ni(Me(2)bqb)] (1), has been studied by cyclic voltammetry and compared with the analogous complex, [Ni(Me(2)bpb)] (2). (C) 2010 Elsevier Ltd. All rights reserved.
Benign synthesis of carboxamide ligands, H2Me2bqb and H2Me2bpb. Preparation, characterization and electrochemistry of Ni(II) complexes: The crystal structure of [NiII(Me2bqb)]
摘要:
A novel and highly efficient approach for the synthesis of H(2)Me(2)bqb and H(2)Me(2)bpb using ionic liquid as an environmentally benign reaction medium has been developed, eliminating the need for the pyridine as a toxic solvent. The Ni(II) complex of the dianionic ligand Me(2)bqb(2-), [Me(2)bqb(2-) = 1,2-bis(quinoline-2-carboxamide)-4,5-dimethyl-benzene dianion], has been synthesized and characterized by elemental analyses and spectroscopic methods, and the crystal and molecular structure of [Ni(Me(2)bqb)] (1), has been determined by X-ray crystallography. The complex exhibits distorted square-planar NiN4 coordination geometry with two short and two long Ni-N bonds (Ni-N similar to 1.85 and similar to 1.96 angstrom, respectively). The electrochemical behavior of [Ni(Me(2)bqb)] (1), has been studied by cyclic voltammetry and compared with the analogous complex, [Ni(Me(2)bpb)] (2). (C) 2010 Elsevier Ltd. All rights reserved.