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)

Abstract

2+2 Cyclocondensation of 1,7-diaminoheptane with α-diketones, viz 2,3-butanedione, 3,4-hexanedione or 4,4’-dimethylbenzil, in the presence of Mg2+, Ca2+, Sr2+ and Ba2+ ions as templates yields a series of complexes of the type [ML(X2)](where L = N4 macrocycle having a 22-membered ring and X=Cl or NCS). The resulting complexes were characterized by elemental analysis conductance measurements and IR and 1H-NMR spectral studies.

Keywords

• macrocyclic complexes
• alkaline earth metal complexes
• conductances
• ir spectra
• nmr spectra