Four dinuclear CoII complexes have been synthesized and structurally characterized with the dinucleating ligand susan (susan=4,7-dimethyl-1,1,10,10-tetra(2-pyridylmethyl)-1,4,7,10-tetraazadecane) varying in exogeneous ligands: [(susan){CoII(CH3CN)2}2](PF6)4, [(susan){CoIICl}2](ClO4)2, [(susan){CoIIBr}2](ClO4)2, [(susan){CoII(μ-OH)CoII}](ClO4)3. The ions are six-coordinate CH3CN ligands five-coo...

Cyclic glyoxalcarbohydrazone[(1,2,4,5,8,9,11,12-octaazacyclotetradeca-5,7,12,14tetraene-3,10-dione) = (glyozalcarbzH)2] complexes of Ni II, PdII, CoII, ZnII and CdII of composition M (glyoxalcarbzH)2X2nH2O (M = Ni II, PdII, CoII,ZnII or CdII and X = Cl> , 1/2 SO4 -2 and n = 0,1 or 4) have been isolated by refluxing appropriate metal salts with glyoxal and carbohydrazide in requisite proportion ...

Complexes of several transition metal ions with alpha-oximinoacetoacetyl pyridine-4-phenylthiosemicarbazone (H3OAPT) have been prepared. Attempts were made to elucidate their geometries by elemental analysis, molar conductance, magnetic measurements and by some spectroscopic (IR, ESR and electronic) techniques. All the investigated metal ions form mononuclear complexes except for CuII, which fo...

first row transition metal complexes of phthalocyanine are employed as catalysts for the oxidation of cyclohexene and cyclooctene using iodosylbenzene and pentafluoroiodosyl benzene. the catalysis was performed in dichloromethane: methanol:water (80:18:2) solvent mixture.  the products of the catalysis for cyclohexene are epoxycyclohexane, 2-cyclohexene-1-ol and 2-cyclohexene-1-one whereas for ...

The conditions for achieving the maximal unquenched orbital angular momentum L = 3 and highest magnetic anisotropy in mononuclear 3d complexes with axial coordination symmetry are examined terms of ligand field theory. It is shown that, apart from known linear two-coordinate 3d7 complex CoII(C(SiMe2ONaph)3)2 characterized by record single-molecule magnet (SMM) performance (with largest spin-rev...

Two new cobaltous-porphyrin complexes, namely (?-piperazine)-bis[(meso-tetra(para-methoxyphenyl)porphyrinato)]cobalt(II) and (piperazine)[meso-tetra(para-chlorophenyl)porphyrin]cobalt(II) dichloromethane disolvate, with the formulas [{CoII(TMPP)}2(?2-pipz)] (complex 1) [CoII(TClPP)(pipz)]·2CH2Cl2 2), were used efficiently as catalysts in degradation of 4-nitrophenol (4-NP) an aqueous hydrogen p...

Mechanically chelating ligands have untapped potential for the engineering of metal ion properties. Here we demonstrate this principle in context CoII-based single-ion magnets. Using multi-frequency EPR, susceptibility and magnetization measurements found that these complexes show some highest zero field splittings reported five-coordinate CoII to date. The predictable coordination behaviour in...

Presented herein is a study of the acid-induced demetalation of two sterically hindered copper corroles, Cu β-octabromo-meso-triphenylcorrole (Cu[Br8TPC]) and β-octakis(trifluoromethyl)-meso-tris(p-methoxyphenyl)corrole (Cu[(CF3)8TpOMePC]). Unlike reductive demetalation, which affords the free-base β-octabromocorrole, demetalation of Cu[Br8TPC] under non- reductive conditions (CHCl3/H2SO4) resu...