Author(s):
V. Lozan
Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2013 Volume 8, no.1
Pages: 58-77
DOI: dx.doi.org/10.19261/cjm.2013.08(1).08
Graphical Abstract: A series of novel tri-, tetra- and pentanuclear complexes composed of dinuclear LM units (M=Co, Ni, Zn; L=24-membered macrocyclic hexaaza-dithiophenolate ligand) and ferrocenecarboxylate ([CpFeC
5H
4CO
2]ˉ), 1,1’-ferrocenedicarboxy-late ([Fe(C
5H
4-CO
2)
2]
2ˉ), acetylene-dicarboxylate, terephthalate, isophthalate, and naphthalene diimide dicarboxylate groups is reported. The complexes, have been synthesized and characterised by UV/Vis-, IR-, NMR-spectroscopy, Cyclovoltammetry, and X-ray crystallography. Each dicarboxylate dianion acts as a quadridentate bridging ligand linking two bioctahedral LM
2 units via µ
1,3-bridging carboxylate functions to generate discrete dications with a central LM
2(O
2C-R-CO
2)M
2L core. The magnetic properties of these compounds reveal the presence of weak ferromagnetic exchange interactions between the Ni
II ions of the dinuclear subunits and negligible coupling across the dicarboxylate bridges.
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