MgII, CaII, SrII and BaII complexes of 2,3,15,16-tetramethyl/ethyl/p-tolyl-1,4,14,17-tetraazacyclohexacosa-1,3,14,16-tetraene

Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India E-mail : rnp_l949@yahoo.co.in Manuscript received 21 September 2007, revised 27 August 2008, accepted 16 September 2008 Hexacoordinated tetraazamacrocyclic complexes of the general formula [MLX2] (where L = N4 macrocycle having 26-membered ring, X = Cl or NCS and M = Mg, Ca, Sr or Ba) have been synthesized by 2+2 cyclocondensation reactions of 1,9-diaminononane with α-diketones viz. 2,3-butanedione, 3,4-hexanedione or 4,4'-dimethylbenzil in the presence of metal ions as templates. The synthesized complexes were characterized by elemental analyses, conductance measurements and IR and 1H NMR spectra