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2-2 Cyclocondensation of 1,7-diaminoheptane with α-diketones, viz. 2,3-butanedi-one. 3,4-hexanedione or 4,4'-dimethylbenzil, in the presence of Mg 2 + , Ca 2 + , Sr 2 + and Ba 2 - ions as templates yields a series of complexes of the type [ML(X 2 )] (where L = N 4 macrocycle having a 22-membered ring and X = Cl or NCS). The resulting complexes were characterized by elemental analysis, conductance measurements and IR and 1 H-NMR spectral studies.

journal of the serbian chemical society

Synthesis and characterization of 2,3,13,14-tetramethyl (ethyl or p-tolyl)- 1,4,12,15-tetraazacyclodocosa-1,3,12,14-tetraene complexes of Mg(II), Ca(II), Sr(II) and Ba(II)