Rhenium(I) di- and tri-carbonyl compounds of polypyridyl-like ligands: electrochemical reactions of fac-[Re(CO)3(dpk)Cl] (dpk = di-2-pyridyl ketone) with electrophiles and Group I and II metal ions

İspir

et al. 2005

A new tetraoxime ligand, (2E, 3E, 9E, 10E)-1, 4, 8, 11-tetraazacyclotetradecane-2, 3, 9, 10-tetrone tetraoxime has been prepared by the template condensation of 1,3-propanediamine and cyanogen-di-N-oxide, obtained by treating (E, E)-dichloroglyoxime in CH 2 Cl 2 with Na 2 CO 3 at )10°C. The coordination chain polymers {[(pnngH 2 ) 2 Ni] n (5) and [(pncgH 2 ) 2 Cu] n (6)} of two transition metal ions, [Ni(II) and Cu(II)] with the vic-dioxime ligand have been prepared. The oxime ligand acts as a polydentate ligand bending through nitrogen atoms in the presence of a base, as do most of the vic-dioximes. In the complexes, the chloride ions coordinate to the nickel and copper ions. The structures of these novel vic-dioxime compounds are proposed on the basis of the elemental analyses, molar conductance data, i.r., and U.v.)visible are presented. Elemental analyses indicate a ligand metal ratio of 1:1 in the coordination polymers. Conductivity measurements have shown that mono-and polynuclear complexes are non-electrolytes. In addition, anti-microbial activities of the compounds have been investigated.

Section: Introductionmentioning

confidence: 99%

New Soluble Coordination Chain Polymers of Nickel(II) and Copper(II) ions and their Biological Activity

İspir

et al. 2005

“…Oximes and their metal complexes are of current interest due to their rich physicochemical properties, reactivity patterns and potential applications in many important chemical processes in the areas of medicine, bioorganic systems, and catalysis, electrochemical and electrooptical sensors [16][17][18][19][20][21][22][23][24][25][26][27][28]. The presence of mildly acidic hydroxyl groups and slightly basic nitrogen atoms makes vic-glyoximes amphoteric ligands which form corrin-type square planar square-pyramidal and octahedral complexes with metal ions such as nickel(II), cobalt(II) and cobalt(III) as central atoms [29,30].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Biological Activity of Novel (E,E)-vic-dioximes

Dağdelen

Toroğlu

2006

A novel vic-dioxime ligand containing the thiourea group, (4E,5E)-1,3-bis{4-[(4-methylphenylamino)methyl] phenyl}-2-thiooxaimidazoline-4,5-dione dioxime, (4) mmdH 2 has been prepared from N,N¢-bis{4-[(4-methylphenylamino)methyl]phenyl}thiourea, (3) mft and cyanogen di-N-oxide. Mononuclear [M(mmdH) 2 ], where M=Ni II , Co II and Cu II complexes of the (4) mmdH 2 bidentate ligand have been obtained with a 1:2 metal:ligand ratio, as do most the vic-dioximes. The complexes are formed by coordination of N, N atoms of the ligand. The vic-dioxime ligand and its some transition metal complexes have been characterized by elemental analyses, molar conductance data, magnetic susceptibility, i.r., 1 H-n.m.r and u.v.-vis. spectroscopy. Conductivity measurements have shown that mononuclear complexes are non-electrolytes. In addition, the ligands and metal complexes were screened for antibacterial and antifungal activities by agar well diffusion techniques using DMF as solvent.

“…Oxime ligands are widely recognized for their interesting physicochemical properties, reactivity patterns, and potential applications in medicinal chemistry [8][9][10][11], bioorganic systems [12][13][14] and the field of electrochemical and electrooptical sensors [15][16][17]. The synthesis of macrocyclic ligands, capable of forming multinuclear complexes, is of great interest for special applications.…”

Section: Introductionmentioning

confidence: 99%

The synthesis and characterization of a new (E, E)-dioxime containing 13-membered dithiadiazamacrocyclic moieties and its mononuclear complexes

Kanteki̇n

Bakaray

Bıyıklıoğlu

2007

A new (E,E)-dioxime, (6Z,7Z)-15,16-dihydro-14H-dibenzo [b,h][1,10,4, 7]dithiadiazacyclotride-cine-6,7(5H,8H)-dionedioxime (H 2 L) has been synthesized by reacting cyanogen-di-N-oxide (2) with 2,2¢-[propane-1,3-diylbis(thio)]dianiline (1). Mononuclear complexes (4) and (5) of this ligand have been synthesized by reacting the vic-dioxime (H 2 L) with NiCl 2 AE 6H 2 O and CoCl 2 AE 6H 2 O, respectively. The BF 2 + capped Ni(II) and Co(III) complexes (6) and (7) of the dioxime have been synthesized from (4) and (5). The new compounds were characterized by a combination of elemental analysis, 1 H-and 13 C-n.m.r, i.r. and m.s. spectral data.