Cobalt-macrocycle complex octahedral

Macrocyclic Fi-donor ligands and vitamin Bj, analogues. The free amine [(97) tet] can be prepared from the previously reported nickel complex. Cobalt-fin) complexes have been prepared with both planar (bcde octahedral) and folded (abed octahedral) co-ordination. Derivatives of the three ligand configurations arising from restricted inversion at the four chiral co-ordinated secondary amino-groups have been prepared (see Scheme 2) and their stabilities and configurations discussed. ... 

When dap reacts with an aromatic 3,3-triamine in the presence of nickel(II), copper(II) or cobalt(II) perchlorate in ethanol, macrocyclic complexes with tetra-dentate ligands [M(L712)](C104)2 and having octahedral structures are isolated (Eq. 3.35) [73]. 

The ions of cobalt(III), rhoditun(III) and iridium(III) are the best templates for assembling octahedral complexes with ligands of the sepulchrate type. To obtain macrocyclic polylactones and polylactams, templates with covalent character bonds, such as Sn, Si, Sb, or B, are used. Copper(I) is the most convenient centre for the synthesis of catenanes. 

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