Abstract
2+2 Cyclocondensation of 1,5-diaminopentane with α-diketones viz. 2,3-butanedione, 3,4-hexanedione or 4,4'-dimethylbenzil in the presence of alkaline earth metal ions as templates yields a series of hexa-coordinated complexes of the type [MLX 2 ] (where M = Mg II , Ca II , Sr II or Ba II , L = N 4 macrocycle having 18-membered ring and X = Cl or NCS). The resulting complexes have been characterized by elemental analyses, conductance measurements, IR and 1 H NMR spectra.
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