Synthesis and characterization of mononuclear cadmium(II) and dinuclear uranyl(VI) complexes with vic-dioximes

Abstract

In this study, the mononuclear complexes of cadmium(II) and dinuclear complexes of uranyl(VI) with five vicdioximes have been obtained. Cadmium(II) forms, with ligands, complexes [(L x H)(Cl)(H 2 O)(Cd)] with x ¼ 1-5. Mononuclear complexes with a metal:ligand ratio of 1:1 were obtained for cadmium(II) with the ligands, and a chloride ion and a water molecule are also coordinated to the cadmium(II) ions. Uranyl(VI) complexes of these ligands are a dinuclear structure with l-hydroxo-bridges. Uranyl(VI) forms, with ligands, complexes [(L x H) 2 (OH) 2 (UO 2 ) 2 ] with x ¼ 1-5, which have a 2:2 metal:ligand ratio. The structures of the complexes were identified by elemental analysis, i.r., and 1 H-n.m.r. spectra, u.v.-vis. spectroscopy, magnetic susceptibility measurements, conductivity measurements and thermogravimetric analysis (t.g.a.).

Synthesis and Spectrophotometrical Investigation of vic-Dioxim Derivatives Bearing Hydrazone Group and Their Metal Complexes

“…Elde edilen bu bileşiklerin termal davranışları (TGA-DTG) incelendiğinde literatürdeki benzer bileşiklerle yaklaşık değerler gösterdiği ve termal kararlı maddeler sınıfında yer alacağı görülmüştür (Saleh et al, 2003;Canpolat et al, 2005 Kurtoğlu et al, 2008 (Selwood, 1956). …”

Synthesis and Characterization of Mononuclear Cobalt(II), Nickel(II), Copper(II), Zinc(II), Cadmium(II) and Dinuclear Uranyl(VI) Complexes with N,N-bis(2-{[(2,2-dimethyl-1,3-dioxolan-4-yl)methyl]amino}butyl) N′,N′-dihydroxyethanediimidamide

“…chemical shifts for the ligand, nickel(II), zinc(II), cadmium(II) and uranyl(VI) complexes is given in chemical shift in the 10.22 p.p.m. range as a singlet, which indicates an (E,E)-structure for the dioxime [11,26]. In the 1 H-n.m.r.…”

“…Vic-dioximes and their coordination compounds are widely used for various purposes in analytical, pigment, biological chemistry, chemical industry, medicinal chemistry and model compounds [2][3][4][5]. In our previous studies we investigated the synthesis and characterization of various transition metal complexes of new vic-dioximes [6][7][8][9][10][11][12][13][14][15][16]. In the present paper we report the synthesis and characterization of mononuclear Co II , Ni II , Cu II , Zn II , Cd II and dinuclear UO 2 VI complexes.…”

Assessment of Two New Ligands for Increasing the Uptake of Cd, Cr, and Ni in Helianthus annuus Grown in a Sandy-Loam Soil

“…Recent research has shown that ligands from oximes, semicarbazones, and thiosemicarbazones may be able to be used as chelators (Babahan et al 2006;Ibrahim et al 2000;Lee et al 2003). The potential to use the ligands as chelators in phytoremediation is supported by their proven ability as biologically active metal chelates for essential applications such as reducing vitamin B12 (Babahan et al 2006;Canpolat et al 2005;Para 2004). In fact, semicarbazones have been shown to form complexes with Cd, Co, Cu, Fe, Mn, Ni, Pb, and Zn (Nigam et al 2000;Para and KarolczykKostuch 2002).…”