123739-99-1

Upstream product

• 327-54-8 1,2,4,5-Tetrafluorobenzene 
• 1079-66-9 chloro-diphenylphosphine 
• 15475-27-1 potassium diphenylphosphine 

Downstream Products

• 174646-25-4 Au₄(1,2,4,5-tetrakis(diphenylphosphino)benzene)(C*C-C₆H₁₃)4 

Relevant academic research and scientific papers

Heat- and Light-Induced Spin Transition of an Iron(II) Polymer Containing the 1,2,4,5-Tetrakis(diphenylphosphanyl)benzene Ligand

A new iron(II) spin-crossover compound containing a phosphane ligand has been synthesized and characterized by magnetic susceptibility, Moessbauer spectroscopy, and heat capacity and photomagnetic experiments. The [Fe(tppb)Br2] complex [tppb = 1,2,4,5-tetrakis(diphenylphosphanyl)benzene] exhibits a gradual spin conversion at T1/2 = 184 K, and displays at low temperature a partial photoconversion of the low-spin (LS) state into the metastable high-spin (HS) state by irradiating the sample at 530 nm.

Polypyridyl-functionalizated alkynyl gold(i) metallaligands supported by tri- and tetradentate phosphanes

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.