Synthesis and characterization of NiII, CuII and ZnII complexes of N,O-mixed donor macrocycles derived from a-diketones and 1,13-diamino-4, 7,1 0-trioxatridecane

Department of Chemistry, University of Rajasthan, Jaipur-302 055, Rajasthan, India E-mail : rnp_1949@yahoo.co.in Manuscript received 28 July 2011, accepted 21 December 2011 NiII, CuII and ZnII complexes or the type [MLCI2) (M = Ni and Zn) and [CuL(N03)2) (L = 17-membered N2O3 macrocycle) have been synthesized by (1 +I] cyclocondensation or 1,13-diaminotrioxatridecane with a-diketones such as 2,3-butanedione, 2,3-pentanedione, 2,3-hexanedione and 3,4-hexanedione in the presence or NiII , CuII and Znll. These complexes have been characterized by elemental analyses, molar conductances, UV-Vis, IR, 1H NMR and FAB mass spectral studies