Novel square-planar cyclic tetranuclear copper(II) complex containing oximate bridges. Synthesis, crystal structure and magnetic properties of tetrakis[diaqua(μ-1,3-dimethylviolurato)copper(II)] tetraperchlorate dihydrate

Abstract

Novel square-planar cyclic tetranuclear copper(II) complex containing oximate bridges. Synthesis, crystal structure and magnetic properties of tetrakis[diaqua( -1,3-dimethylviolurato)copper(II)] tetraperchlorate dihydrate

Synthesis and characterization of a novel series of metallothiocarbohydrazone polymers and their adducts

“…In contrast, the reaction of Co(NO 3 ) 2 ·6H 2 O with the polymeric H 3 L ligand in the presence of LiOH afforded a binuclear complex/each monomeric unit (10) in which the Co II ion has a tetrahedral configuration as evidenced from its magnetic moment (μ eff = 3.23 BM) and its visible spectrum [13]. The visible spectrum (Table 3) showed an intense broad band at 610 nm assignable to the main ν 3 transition, 4 A 2 (F) → 4 T 1 (P), which is characteristic of tetrahedral Co II complexes. The higher energy band observed at 415 nm is due to ligand-to-metal CT transition.…”

“…Such complexes are of interest not only for their unusual structures and the simple synthetic methods used to prepare them but also for their special functional properties such as luminescence [2], redox activity [3], and magnetism [4]. However, in the absence of a templating agent, the reaction of 4,6-diacetylresorcinol with thiocarbohydrazide afforded a polymeric ligand, poly(thiocarbohydrazone) (H 3 L).…”

Synthesis and DFT Calculations of Dinuclear Complex of Co2+, Ni2+ and Cu2+ with Macrocyclic Schiff base Ligands

“…These shifts are supporting, also, a complex formation via co-ordination through S atom. Furthermore, the IR spectra of the metal complexes have shown new bands at 350 to 404 and 430 to 503 cm -1 , which have been assigned to (M%S) and (M%N) [4,27,28]. Moreover, the , which may well be due to (M%Cl)29.…”

“…ECP has represented chemically inactive major electrons. As a result of these electrons, the cost of computation has been reduced because of the fact that the increment in cost is resulted from ~N 4 , in which N is the number of such electrons which are treated explicitly. MOLDEN program and Gaussian, Inc. provided GaussView 3.0.…”

“…Such complexes are of interest not merely for their uncommon structures; rather, also for their unique functional characteristics such as magnetism and luminescence redox activity [2][3][4] . 4+ is situated over the center or inversion, which contains four atoms of nickel within the square's corners, having Ni….Ni isca 4.8A° as the edge length.…”