Tetradentate Ligand Tris Research Articles

Syntheses and x-ray structural characterizations of three-coordinate gold(I) and silver(I) complexes with the potentially tetradentate ligand tris(2-(diphenylphosphino)ethyl)amine (NP3): [Au2(NP3)2](BPh4)2, Au(NP3)PF6, Au(NP3)NO3, Ag(NP3)NO3, and Ag(NP3)PF6. The Au(I) compounds are luminescent

Reaction of the tetradentate «tripodlike» ligand tris(2-(diphenylphosphino)ethyl)amine (NP 3 ) with LAuX [L=PPh 3 , P(CH 2 CH 2 CN) 3 , THT; X=Cl - , NO 3 - , PF 6 - , BPh 4 - ] and AgX (X=NO 3 - ,PF 6 - ) produces the three-coordinatecomplexes [Au 2 (NP 3 ) 2 ] (BPh 4 ) 2 (dimer) (I), Au(NP 3 )PF 6 (monomer), and Au(NP 3 )NO 3 (monomer) (3), the four-coordinate Ag(NP 3 )NO 3 (monomer), and the three-coordinate complex Ag(NP 3 )PF 6 (monomer)

Platinum group metal complexes of tris(2-(diphenylphosphino)ethyl)amine

Abstract A mixed donor potential tetradentate ligand tris(2-(diphenylphosphino) ethyl)amine (TPEA) was synthesised by a modified procedure and characterized by 1 H, 13 C and 31 P NMR spectral data. Ru(II) complexes of TPEA were prepared by its interaction with RuCl 2 (PPh 3 ) 3 and RuCl 2 (DMSO) 4 to give [RuCl 2 (TPEA)] and RuCl 2 (DMSO)(TPEA) respectively. Ru(III) complexes of the composition RuX 3 (TPEA) or [RuX 2 (AsPh 3 )(TPEA)]X were obtained by the reaction of TPEA with RuX 3 (AsPh 3 ) 2 · MeOH (X = Cl − , Br − ). A neutral Rh(I) complex of the composition RhCl(TPEA) was obtained by the reaction of [RhCl(COD)] 2 with TPEA. Cationic metal carbonyl complexes of the type [M(CO)(TPEA)]Cl (M = Rh, Ir) were obtained by the interaction of [M(CO)Cl(PPh 3 ) 2 ] with TPEA. The reaction of hydrated RhCl 3 with TPEA gave [RhCl 2 (TPEA)]Cl in methanol. A five coordinated cationic complex [PdCl(TPEA)]Cl was obtained by the reaction of PdCl 4 2− with TPEA. Interaction of PtCl 2 (COD) with TPEA however gave the square planar complex [PtCl(TPEA)]Cl. All the complexes were characterized by physico-chemical and spectroscopic methods.

Synthesis and structural study of cobalt(II) complexes with the polypyrazolyl ligand tris(1-pyrazolylethyl)amine, TPyEA. Crystal and molecular structure determination of the dinuclear complex [CoBr(TPyEA)] 2(BPh 4) 2

Cobalt(II) complexes with the tetradentate ligand tris(1-pyrazolylethyl)amine, TPyEA, and a variety of co-ligands have been synthesized and characterized. The complexes with general formula [CoX(TPyEA)]BPh 4 are mononuclear and five-coordinate when X = NCS, NCO, I, ClO 4, or dinuclear with six-coordinate metal centers when X = F, Cl, Br, N 3. The structure of the dinuclear bromo derivative has been determined by X-ray analysis. Each cobalt atom in the dinuclear [CoBr(TPyEA)] 2+ 2 cation is coordinated by the four nitrogen donor atoms of the TPyEA ligand and by the two bridging bromine atoms in a distorted octahedral geometry. The dinuclear complexes are reversibly converted in the solid state to mononuclear five-coordinate species by heating or grinding. The same dissociation occurs upon dissolution in acetone. The complexes with bidentate co-ligands, [CoY(TPyEA)]BPh 4 (Y = 2-mercaptobenzoate), [CoY(TPyEA)] ClO 4 (Y = acetylacetonate, benzoylacetonate), and [Co(NCS) 2(TPyEA)] are six-coordinate. Also the above six-coordinate bis thiocyanate complex undergoes a transformation upon dissolution or grinding.

Rhodium(III) and rhodium(I) complexes with tripod tetradentate ligands

Rhodium(III) complexes with the tripod tetradentate ligand tris(2-diphenylphosphinoethyl)amine, np 3, of formula [RhCl 2(np 3)] Y (Y = Cl, PF 6, BPh 4), have been prepared and characterized. One of the coordinated chlorine atoms in these compounds may be replaced by a molecule of acetonitrile. The hydrido complex [RhHCl(Cynp 3] BPh 4·(CH 3) 2CO has been obtained by reaction of rhodium trichloride hydrate with the tripod ligand tris(2-dicyclohexyl-phosphinoethyl)amine, Cynp 3, bearing bulky subsitutuents on the phosphorus atoms. All of the above complexes are assigned six-coordinated structures, mainly on the basis of their 1H and 31P n.m.r. spectra. The crystal structure of the hydrido complex has been determined by X-ray diffraction analysis. The np 3 derivatives are easily reduced to give five-coordinate rhodium(I) complexes with formulae [RhH(np 3] and [RhCl(np 3)].

Transition metal complexes from vanadium(II) to copper(II) with the tetradentate ligand tris(1-pyrazolylethyl)amine

Transition metal complexes from vanadium(II) to copper(II) with the tetradentate ligand tris(1-pyrazolylethyl)amine

Cobalt(II) and nickel(II) complexes with the polydentate ligand tris(3,5-dimethyl-1-pyrazolylethyl)amine, MeTPyEA. X-ray investigation of two [NiBr(MeTPyEA)] + cations: a case of distortional isomerism

Nickel(II) and cobalt(II) complexes with the tetradentate ligand tris-(3,5-dimethyl-1-pyrazolylethyl)amine, MeTPyEA, have been prepared and characterized with the usual physicochemical methods. A case of distortional isomerism for the five-coordinate complex cation [NiBr(MeTPyEA)] + has been ascertained through X-ray analyses of the two compounds [NiBr(MeTPyEA)]BPh 4·C 2H 5OH and [NiBr(MeTPyEA)] BPh 4·(CH 3) 2CO. The two isomers have geometries approaching the ideal trigonal bi-pyramid and square pyramid, respectively. The structural rearrangements of the ligand framework occurring in these nickel complexes and in the four-coordinate [Co(MeTPyEA)](BPh 4) 2 complex are compared. Suggestions are proposed about the electronic factors which may determine the different coordination numbers, four, five, and six, within the series of 3d metal complexes with the ligand MeTPyEA.

Octahedral nickel(II) complexes with the tripod ligand tris(2-dimethylarsionethyl)amine

Nickel(II) complexes with the tripod tetradentate ligand tris(2-dimethylarsinoethyl)amine (Me 6nas 3) having the general formula [NiX 2(Me 6nas 3)], X = Cl, Br, I, NCS, were prepared and characterized. All the complexes have octahedral geometry: the chloride and bromide derivatives are monomeric; the iodide and thiocyanate compounds have a polymeric chain structure in which the ligand Me 6nas 3 is bridging between two nickel atoms.

Substitution reactions of five-coordinate complexes. 2. Mechanism of ligand replacement in trigonal-bipyramidal nickel(II) and platinum(II) complexes containing the tetradentate ligand tris(o-(diphenylarsino)phenyl)arsine

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstitution reactions of five-coordinate complexes. 2. Mechanism of ligand replacement in trigonal-bipyramidal nickel(II) and platinum(II) complexes containing the tetradentate ligand tris(o-(diphenylarsino)phenyl)arsineHarvest L. Collier and Eugene GrimleyCite this: Inorg. Chem. 1980, 19, 2, 511–515Publication Date (Print):February 1, 1980Publication History Published online1 May 2002Published inissue 1 February 1980https://doi.org/10.1021/ic50204a046RIGHTS & PERMISSIONSArticle Views99Altmetric-Citations2LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (646 KB) Get e-Alerts Get e-Alerts

Complexes of bipositive metal ions from vanadium (II) to copper(II) with tris(3,5-dimethyl-1-pyrazolylethyl)amine

Complexes of bipositive metal ions from vanadium(II) to copper(II) with tris(3,5-dimethyl-1-pyrazolyl-ethyl)amine Metal complexes of polypyrazolyl ligands have been found to provide significant examples of bioinorganic models [1]. As a part of a general investigation on this class of complexes [2], the study of compounds of the bipositive ions from vanadium(II) to copper(II) with the potentially tetradentate ligand tris(3,5-dimethyl-1-pyrazolylethyl)amine(TPy-EA) has been undertaken. ▪ t001 Some Representative Complexes of the Ligand TPyEA. μeff μB Coordination Geometry [V(NCS) 2 (TPyEA)] 3.81 octahedral [CrBr(TPyEA)] BPh 4·C 2H 5OH 4.83 trig. bipy ← square pyr. [MnBr (TPyEA) ] BPh 4· 0.5 CH 2 Cl 2 5.86 trigonal bipyramidal [ FeClTPyEA ] BPh 4· 0.5CH 2 Cl 2 5.50 trigonal bipyramidal [Co(NCS)(TPyEA)] BPh 4 4.43 trigonal bipyramidal [Co(TPyEA)] (BPh 4) 2 4.22 trigonal pyramidal [Co(TPyEA)] CoBr 4 4.48 trig. pyr. + tetrahed. [ NiBr(TPyEA,) ] BPh 4 3.26 trigonal bipyramidal [Cu(CIO 4)(TPyEA)] ClO 4 1.88 trig. bipy. ← square pyr.

Some Reactions of Complexes of Vanadium(V) with Hydroxylamin: Formation of nitrosyl‐ and Hydroxylamido(1−)‐complexes

AbstractSyntheses and characterization of a series of complexes of vanadium(V) containing one or two coordinated N‐methylhydroxylamido(1−)‐ and hydroxylamido(1−)‐ligands, respectively, are reported: [VO(H(CH3)NO)(AA)2]°, [VO(H2NO)(AA)2]°, [VO(H(CH3)NO)2(AA)]°, [VO(H2NO)2 (AA)]° ((AA) = pyridine‐2‐carboxylate), [VO(BB)(H2NO)2]+ (BB = 2,2′‐bipyridyl or 1,10‐phenanthroline). In addition, nitrosylhydroxylamido(O, N) complexes of vanadium have been prepared from solutions of Vv and H2NOH and a tridentate organic ligand: [V(AAA)(H2NO)(NO) (OH2)]n ((AAA) = pyridine‐2,6‐dicarboxylate n = 1−; 2,2′,6′,2″‐tripyridyl n = 1+; 1,1,1‐ tris(aminomethyl)‐ethane n = 1+). The coordinated H2O can be substituted by NH3 or CN−. Red‐ nitrosyl complexes have been obtained from alkaline solutions of the tetradentate ligand tris‐(2‐hydroxypropyl)amine (THA), vanadium(V) and H2NOH: [V(THA)(NO)(H2O)]−.

Synthesis, properties, and structural characterizations of nonstoichiometric hydrido complexes of nickel with the tetradentate ligand tris(2-diphenylphosphinoethyl)amine

Synthesis, properties, and structural characterizations of nonstoichiometric hydrido complexes of nickel with the tetradentate ligand tris(2-diphenylphosphinoethyl)amine