Synthesis, structural characterization of nickel(II) hexaazamacrotetracyclic complexes with azido, isocyanato and nitrito ligands

Choi, Ki‐Young; Lee, Kyu-Chul; Lee, Han-Hyoung; Suh, Myoung‐Seok; Kim, Moon-Jip; Kang, Sung Kwon

doi:10.1016/j.molstruc.2005.05.036

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…This fact may be due to the coordination of the carboxylate group in the H-cbdcligand. Similar results are also observed for tetraaza macrocyclic nickel(II) complexes containing the axial groups [28,29]. Also, the oxidation and reduction potentials of 2 are considerably more cathodic and anodic than those of [Cu(L)](ClO 4 ) 2 [25].…”

Section: Crystal Structuressupporting

confidence: 80%

Self-assembly of metal(II) tetraaza macrocyclic complexes with cyclobutane-1-carboxylic acid-1-carboxylate ligand linked by hydrogen bond

Choi

Kim

2008

Struct Chem

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The reaction of [M(L)]Cl 2 Á 2H 2 O (M = Ni 2+ and Cu 2+ , L = 3,14-dimethyl-2,6,13,17-tetraazatricyclo[14,4, 0 1.18 ,0 7.12 ]docosane) with 1,1-cyclobutanedicarboxylic acid (H 2 -cbdc) generates 1D and 2D hydrogen-bonded infinite chains [Ni(L)(H-cbdc -) 2 ] (1) and [Cu(L)(H-cbdc -) 2 ] (2).(H-cbdc -= cyclobutane-1-carboxylic acid-1-carboxylate). These complexes have been characterized by X-ray crystallography, spectroscopy, and cyclic voltammetry. The crystal structure of 1 shows a distorted octahedral coordination geometry around the nickel(II) ion, with four secondary amines and two oxygen atoms of the H-cbdc -ligand at the trans position. In 2, the coordination environment around the central copper(II) ion shows a Jahn-Teller distorted octahedron with four Cu-N bonds and two long Cu-O distances. The cyclic voltammogram of the complexes undergoes two oneelectron waves corresponding to M II /M III and M II /M I processes. The electronic spectra and electrochemical behavior of the complexes are significantly affected by the nature of the axial H-cbdc -ligand.

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Section: Crystal Structuressupporting

confidence: 80%