185628-99-3Relevant academic research and scientific papers
Polypyridyl-functionalizated alkynyl gold(i) metallaligands supported by tri- and tetradentate phosphanes
Ferrer, Montserrat,Giménez, Leticia,Gutiérrez, Albert,Lima, Jo?o Carlos,Martínez, Manuel,Rodríguez, Laura,Martín, Avelino,Puttreddy, Rakesh,Rissanen, Kari
, p. 13920 - 13934 (2017/10/24)
A series of alkynyl gold(i) tri and tetratopic metallaligands of the type [Au3(CC-R)3(μ3-triphosphane)] (R = 2,2′-bipyridin-5-yl or C10H7N2, 2,2′:6′,2′′-terpyridin-4-yl or C15H10N3; triphosphane = 1,1,1-tris(diphenylphosphanyl)ethane or triphos, 1,3,5-tris(diphenylphosphanyl)benzene or triphosph) and [Au4(CC-R)4(μ4-tetraphosphane)] (R = C10H7N2, C15H10N3; tetraphosphane = tetrakis(diphenylphosphanylmethyl)methane or tetraphos, 1,2,3,5-tetrakis(diphenylphosphanyl)benzene or tpbz, tetrakis(diphenylphosphaneylmethyl)-1,2-ethylenediamine or dppeda) were obtained in moderate to good yields. All complexes could be prepared by a reaction between the alkynyl gold(i) polymeric species [Au(CC-R)]n and the appropriate polyphosphane. An alternative strategy that required the previous synthesis of the appropriate acetylacetonate precursors [Aun(acac)n(μn-polyphosphane)] ("acac method") was assayed, nevertheless only the polyacac derivatives [Au3(acac)3(μ3-triphosphane)] (triphosphane = triphos and triphosph) and [Au4(acac)4(μ4-tetraphos)] could be isolated and characterized. All compounds were characterized by IR, multinuclear NMR spectroscopy and ESI(+) mass spectrometry. The X-ray crystal structure of complexes [Au4(CC-C10H7N2)4(μ4-tetraphos)] and [Au4(CC-C10H7N2)4(μ4-tpbz)] showed the involvement of all the gold atoms in close intramolecular Au?Au contact as well as intermolecular π stacking interactions between the aromatic rings of the polypyridyl ligands. The photophysical properties of the synthesized compounds were carefully studied and used as a probe of their possible use as multidentate ligands for Cu(i) and Zn(ii). The UV-Vis speciation studies of the complexation reactions were conducted via metal titration and, in most cases the dangling units of the ligand were found to behave in a fairy independent manner. While in the case of Cu(i) multiple equilibria exist in solution a single complex is detected for Zn(ii) under the conditions studied.
Synthesis and Crystal Structure Determination of Bifunctional Phosphine-Linked Triplatinum Double-Cluster Complexes
Imhof, Daniel,Burckhardt, Urs,Dahmen, Klaus-Hermann,Joho, Felix,Nesper, Reinhard
, p. 1813 - 1820 (2008/10/09)
Reactions of [Pt3(μ-CO)3(PCy3)3] (1) and [Pt3(μ-CNXyl)2(μ-CO)(CNXyl)(PCy3) 2] (2) (Cy = C6H11, Xyl = C8H9) with 1/2 equiv of a bifunctional metal phosphine cation [(MPR′2)2(R)]2+ (M = Cu, Ag, Au; R = C6H4, (CH2)2C6H4, Fe(C5H5); R′ = C6H5, C6H11) yielded quantitatively [{Pt3(μ-CO)3(PCy3)3} 2{(MPR′2)2 (R)}]2+ and [(Pt3(μ-CNXyl)2-(μ-CO)(CNXyl)(PCy3) 2}2{(MPR′2)2(R)}] 2+, respectively. The compounds were characterized by IR-, MS-, and 31P-NMR spectroscopy. The X-ray structure is given for [{Pt3(μ-CO)3(PCy3)3} 2{(AuPPh2)2(CH2)2C 6H4)}][PF6]2 (14), which crystallizes in the triclinic space group P1 with Z= 1, a = 15.350 A. b = 17.150 A, c = 20.446 A, α = 84.54°, β= 84.84°, and γ = 64.56°. The structure was refined to R = 0.0435 for the 8430 observed reflections (I > 3σ(I)).
