New macrocyclic binuclear nickel(ii) complexes have been synthesized by using the bicompartmental mononuclear complex [NiL] [3,30-((1E,7E)-3,6-dioxa-2,7-diazaocta-1,7-diene-1,8-diyl)bis(3-formyl-5-methyl-2-diolato)nickel(II)] with various diamines like 1,2-bis(aminooxy)ethane (L(1)), 1,2-diamino ethane (L(2)), 1,3-diamino propane (L(3)), 1,4-diamino butane (L(4)), 1,2-diamino benzene (L(5)), an...

The synthesis, molecular and electronic structures, redox properties of pyrazine(diimine) (PzDI) metal dihalide complexes (DiPPPZDI)MX2 (DiPP = 2,6-diisopropylphenyl; M Mn, Fe, Co, Ni; X Cl, Br) are presented compared. reduced to (DiPPPZDI)MX monohalide complexes, the role ligand non-innocence in structure compounds is examined compared related pyridine(diimine) (PDI) compounds. were characteri...

The C═N bond is a critical structural piece of many N-donor ligand scaffolds and central to the properties reactivity important coordination complexes. For example, units play key role in “redox non-innocence” α-diimine complexes making charge-transfer excited-state character available N-heterocyclic ligands such as bipyridine. In N-heterocycles like pyridine, benzannulation can be used extend ...

The nickel(ii) complexes of three unsymmetrical thiosemicarbazone-based ligands featuring a sterically hindered salicylidene (1), aminophenol (2) or thiophenol (3) moiety were synthesized and structurally characterized. The metal ion lies in an almost square planar geometry in all the complexes. The cyclic voltammetry (CV) curve of 1 shows an irreversible oxidation wave at E = 0.49 V, which is ...

The first series of complexes of niobium(v) oxide trifluoride, [NbOF3(OPR3)2] (R = Me or Ph), [NbOF3(dppmO2)] (dppmO2 = Ph2P(O)CH2P(O)Ph2), [NbOF3(dmso)2], [NbOF3(tmeda)] (tmeda = Me2N(CH2)2NMe2) and [NbOF3(diimine)] (diimine = 2,2'-bipy, 1,10-phen) have been prepared, either by reaction of the corresponding complexes of NbF5 and hexamethyldisiloxane (HMDSO) in CH2Cl2-MeCN solution, or directly...

a series of dissymmetric dinuclear complexes were synthesized, as dual site catalysts in ethylene polymerization,by coupling the allylated a-diimine complexes of the metals ti, zr, v, ni and pd with the ansa-zirconocenecomplex [c5h4-sih(me)-c5h4]zrcl2 possessing a hydride silane moiety. the different stages of syntheses includedthe formation of bis(cyclopentadienide)methyl silane which was util...

The first series of complexes of niobium(V) oxide trifluoride, [NbOF3(OPR3)2] (R = Me or Ph), [NbOF3(dppmO2)] (dppmO2 = Ph2P(O)CH2P(O)Ph2), [NbOF3(dmso)2], [NbOF3(tmeda)] (tmeda = Me2N(CH2)2NMe2) and [NbOF3(diimine)] (diimine = 2,2’-bipy, 1,10-phen) have been prepared, either by reaction of the corresponding complexes of NbF5 and hexamethyldisiloxane (HMDSO) in CH2Cl2–MeCN solution, or directly...

Casiopeínas® is a family of copper complexes with the general formulae [Cu(N-N)(N-O)]NO3 and [Cu(N-N)(O-O)]NO3; where N-N = substituted aromatic diimine (2,2’-bipyridine (bipy) or 1,10-phenanthroline (phen)); N-O = α-aminoacidate or a peptide; and O-O = acetylacetonate (acac) or salicylaldehydate. These compounds have shown antiproliferative activity in vitro and antitumor activity in several m...

A series of mixed ligand ruthenium(II) complexes [Ru(Hdpa)2(diimine)](ClO4)2, 1-5 where Hdpa is 2,2'-dipyridylamine and diimine is 1,10-phenanthroline (phen) and a modified/extended 1,10-phenanthroline such as, 5,6-dimethyl-1,10-phenanthroline (5,6-dmp), dipyrido[3,2-d:2',3'-f]quinoxaline (dpq), 5-methyldipyrido[3,2-d:2',3'-f]quinoxaline (mdpq) and dipyrido[3,2-a:2',3'-c]phenazine (dppz) have b...

Two series of Pt(diimine)(dithiolate) complexes have been prepared in order to investigate the effects of molecular design on the excited-state properties of this chromophore. The first series comprises Pt(dbbpy)(dithiolate) complexes where dbbpy ) 4,4′-di-tert-butyl-2,2′-bipyridine and the dithiolates are 1-(tert-butylcarboxy)-1cyanoethylene-2,2-dithiolate (tbcda), 1-diethylphosphonate-1-cyano...