The asymmetrical tripodal tetraamine ligand N[(CH2)3NH2]2[(CH2)2NH2] (ppe) was condensed with 2-acetylpyridine in the presence of nickel(II) ion. In ethanolwater solution the reaction stops after the first stage of condensation, and a new nickel(II) complex of an acyclic pentadentate (N5) mono Schiff base ligand was obtained. X-ray structure analysis of the resulting complex, [Ni(ppe-py)(H2O)](...

Reported is the new bispidine-derived hexadentate ligand (L = 3-(2-methylpyridyl)-7-(bis-2-methylpyridyl)-3,7-diazabicyclo[3.3.1]nonane) with two tertiary amine and four pyridine donor groups. This ligand can form heterodinuclear and mononuclear complexes and, in the mononuclear compounds discussed here, the ligand may coordinate as a pentadentate ligand, with one of the bispyridinemethane-base...

We have synthesized and characterized two Mn(II) seven-coordinate complexes with N5 pentadentate ligands, which contain hydrazone and hydrazide groups respectively. We have shown that insertion of hydrazido (amido) groups into the ligand sphere increases the negative charge of the chelate, without changing a donor atom set and coordination geometry, and radically modulate a redox activity of se...

The newly synthesized biphenyldicarboxylic acid Schiff base and its complexes with Cu(II) were synthesized, their spectroscopic structural analysis was performed. reaction of the ligand copper(II) acetate in different solvents resulted formation two solvatomorphic complexes, one MeOH, other DMF molecules, crystal lattice. differences results thermal could be explained by polarities present. SC-...

Abstract Rhodium(III) and ruthenium(II) complexes supported by a pentadentate tetrapodal ( pentaPod ) phosphine ligand are synthesized through abstraction of one chloride from initially obtained κ 4 ‐ coordinated dichloro [MCl 2 ‐P Me PP Ph )] +/0 (M=Rh(III), Ru(II)) with alkali salts weakly coordinating anions. While for the rhodium 5 complex remaining, axial could not be replaced di‐ or triat...

A series of cobalt complexes with pentadentate pyridine-rich ligands is studied. An initial Co(II) amine complex 1 is prone to aerial oxidation yielding a Co(III) imine complex 2 that is further converted into an amide complex 4 in presence of adventitious water. Introduction of an N-methyl protecting group to the ligand inhibits this oxidation and gives rise to the Co(II) species 5. Both the C...

A rapid, low-cost, and selective method for simultaneous direct determination of maneb group residues (containing ethylenebis propylenebis dithiocarbamates) in fruit by liquid chromatography coupled to tandem mass spectrometry was developed validated the current study. The results showed could be melt stabilized 5 v% ethylenediamine 60 days keeping conventional refrigerators, which a stable ion...

Multidentate Schiff base ligands derived from a selection of biphenyl- and terphenyl polyamines were synthesized, their reactivity towards divalent (Ni, Cu, Zn, Cd) trivalent (Co, Y, Lu) metals was studied by single-crystal X-ray diffraction analysis, NMR spectroscopy, UV/Vis spectroscopy for the Cu(II) complexes. Large variations in resulting complexes observed based on relative position amine...