Summary
Ethylenediamine and 1,3-diphenyl-1,3-propanedione react in the presence of divalent nickel, cobalt and copper salts to form the complexes of a 14-membered N4-tetradentate macrocycle. These macrocyclic complexes obtainedvia metal template synthesis are of the type [M(Ph4-[14]-tetraene-N4)X2] where M = NiII, CoII or CuII; X = Cl, Br, NO3 or NCS. The coordination takes place through the imine nitrogen atoms which are bridged by 1,3-diphenyl-1,3-propanedione moieties. These macrocyclic complexes were characterised by conductance measurements, molecular weight determination, magnetic, electronic and i.r. spectral studies.
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Malik, W.U., Bembi, R. & Singh, R. Synthesis and characterisation of some transition metal complexes with tetraaza-14-tetraene macrocyclic ligand; 2,4,9,11-tetraphenyl-1,5,8,12-tetraazacyclotetradeca-1,4,8,11-tetraene. Transition Met Chem 8, 62–64 (1983). https://doi.org/10.1007/BF00618803
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DOI: https://doi.org/10.1007/BF00618803