37095-27-5Relevant academic research and scientific papers
Homo- And hetero-metallophilicity-driven synthesis of highly emissive and stimuli-responsive Au(i)-Cu(i) double salts
Kobayashi, Ryosuke,Yumura, Takashi,Imoto, Hiroaki,Naka, Kensuke
, p. 5382 - 5385 (2021/06/12)
Complex salts composed of cationic Au(i) and anionic Cu(i) species were synthesized by utilizing bis(diphenylarsino)methane (dpam) and bis(diphenylphosphino)methane (dppm) ligands. The discrete tetranuclear complexes were obtained as crystals, and the four-metal chain, Cu?Au?Au?Cu, was linked through homo- and hetero-metallophilic interactions. Three crystal polymorphs were obtained for the dpam- and dppm-complexes, depending on the recrystallization solvent. All the crystals exhibited intense phosphorescence (quantum yields up to 0.97) at room temperature, and the emission color of each crystal was significantly different. The crystals could be interconverted by exposure to solvent vapor, and this was accompanied by a drastic change in the emission color.
Oxidative 1,2-Difunctionalization of Ethylene via Gold-Catalyzed Oxyarylation
Harper, Matthew J.,Emmett, Edward J.,Bower, John F.,Russell, Christopher A.
supporting information, p. 12386 - 12389 (2017/09/22)
Under the conditions of oxidative gold catalysis, exposure of ethylene to aryl silanes and alcohols generates products of 1,2-oxyarylation. This provides a rare example of a process that allows catalytic differential 1,2-difunctionalization of this feedstock chemical.
Exceptionally fast carbon-carbon bond reductive elimination from gold(III)
Wolf, William J.,Winston, Matthew S.,Toste, F. Dean
, p. 159 - 164 (2014/02/14)
Reductive elimination of carbon-carbon bonds occurs in numerous metal-catalysed reactions. This process is well documented for a variety of transition metal complexes. However, carbon-carbon bond reductive elimination from a limited number of Au(III) complexes has been shown to be a slow and prohibitive process that generally requires elevated temperatures. Herein we show that oxidation of a series of mono- and bimetallic Au(I) aryl complexes at low temperature generates observable Au(III) and Au(II) intermediates. We also show that aryl-aryl bond reductive elimination from these oxidized species is not only among the fastest observed for any transition metal, but is also mechanistically distinct from previously studied alkyl-alkyl and aryl-alkyl reductive eliminations from Au(III).
Synthesis and structural studies of some gold(I) complexes containing selenoureato ligands
Molter, Anja,Mohr, Fabian,Rust, Joerg,Lehmann, Christian W.
, p. 10586 - 10591,6 (2012/12/12)
N,N-Diethyl-N′-4-nitrobenzoylselenourea (HLSe) reacts with the mono- and dinuclear phosphine gold(I) chloro complexes [AuCl(PR 3)] (R=Ph, o-tol, Et) and [Au2Cl2(μ-P-P)] (P-P=dppm, dppe, dppp, dppb, dppf) in the presence of base to give gold(I) phosphine selenoureato complexes [Au(LSe)(PR3)] [R=Ph (1), o-tol (2), Et (3)], [Au2(LSe)2(μ-P-P)] [P-P=dppm (4), dppe (5), dppp (6), dppb (7), dppf (8)] in excellent yields. The compounds were fully characterised by spectroscopic methods and, in the case of compounds 1, 5 and 8, by single crystal X-ray diffraction. The compounds consist of a gold atom bound in linear fashion to the phosphine ligand and the selenium atom from the deprotonated acylselenourea. These complexes thus represent the first examples of acylselenoureato metal compounds in which the ligands do not adopt the typical O,Se chelating mode but rather coordinate to the metal only through the selenium atom.
Synthesis, structures and anti-malaria activity of some gold(i) phosphine complexes containing seleno- and thiosemicarbazonato ligands
Molter, Anja,Rust, Joerg,Lehmann, Christian W.,Deepa, Ganesh,Chiba, Peter,Mohr, Fabian
, p. 9810 - 9820 (2011/12/03)
A series of both mono- and dinuclear gold(i) phosphine complexes containing monoanionic seleno- and thiosemicarbazones as ligands were prepared and fully characterized by spectroscopic methods and, in some cases, by single crystal X-ray diffraction. The in vitro anti-malaria activity of some of these compounds was investigated in chloroquine sensitive strains of Plasmodium falciparum. The IC50 results show that the sulfur containing compounds exhibit activity similar to that of chloroquine, whilst the selenium derivatives display only moderate anti-malaria activity.
Halogen photoreductive elimination from gold(III) centers
Teets, Thomas S.,Nocera, Daniel G.
, p. 7411 - 7420 (2009/10/17)
Monomeric complexes of the type Au III (PR 3 )X 3 and bimetallic complexes of the type Au 2 I,III [μCH 2 (R 2 P) 2 ]X 4 and Au 2 III,III [μ-CH 2 (R 2 P) 2 ]X 6 (R = Ph, Cy, X = Cl - , Br - ) undergo facile photoelimination of halogen. M-X bond activation and halogen elimination is achieved upon LMCT excitation of solutions of Au III complexes in the presence of olefin chemical traps. As opposed to the typical one-electron redox transformations of LMCT photochemistry, the LMCT photochemistry of the Au III centers allows for theunprecedented (i) two-electron photoelimination of X 2 from a monomeric center and (ii) four-electron photoelimination of X 2 from a bimetalllic center. The quantum yields for X 2 photoproduction, in general, are between 10percent and 20percent for all species, showing only minimal dependence on the identity of the ligands about gold, or the nuclearity of the complex. Efficient X 2 photoelimination is observed in the absence of a chemical trap, providing a rare example of authentic, trap-free halogen elimination from a transitionmetal center.
Polymeric and macrocyclic gold(I) complexes with bridging dithiolate and diphosphine ligands
Hunks, William J.,Jennings, Michael C.,Puddephatt, Richard J.
, p. 3605 - 3616 (2008/10/09)
The reaction of digold(I) diphosphine complexes [Au2(O2CCF3)2(μ-Ph2P-X -PPh2)] with dithiols HS-Y-SH can give either macrocyclic complexes [Au2(μ-S-Y-S)(μ-Ph2P-X-PPh2)] or polymeric complexes [Au2(μ-S-Y-S)(μ-Ph2P-X-PPh2)] n. The structures of the macrocyclic complex [Au2{μ-(S-4-C6H4)2S}{μ -Ph2P(CH2)4PPh2}], and the polymeric complexes [Aun{μ-(S-CH2CO2CH2CH 2O)2-1,4-C6H4}n(μ- trans-Ph2PCH{double bond, long}CHPPh2)n] and [Aun{μ-(S-CH2CO2CH2CH 2O)2-1,5-C10H6}n(μ -trans-Ph2PCH{double bond, long}CHPPh2)n] have been determined. Evidence is presented that the complexes exist primarily as macrocycles in solution and that, in favorable cases, ring-opening polymerization occurs during crystallization.
N-Metallation of MS2N2 rings. X-ray crystal structures of [(η5-C5Me5)Ir(S 2N2)Au(PPh3)][ClO4], [{η 5-C5Me5Ir(S2N2)Au} 2 (μ2-dppm)][ClO4]2 and [Au(dppeS-P)Cl]2
Aucott, Stephen M.,Bhattacharyya, Pravat,Milton, Heather L.,Slawin, Alexandra M. Z.,Woollins, J. Derek
, p. 1466 - 1469 (2007/10/03)
Bimetallic complexes [(η5-C5R5) M(S2N2)Au(PPh3)][ClO4] and tetrametallic species [{(η5-C5R5) M(S 2N2)Au}2(μ2-P^P)][ClO 4]2 (R = H, M = Co; R = Me, M = Ir; P^P = dppm or dppe) can be prepared by treatment of [(η5-C5R 5)M(S2N2)] with gold(I) electrophiles generated by chloride abstraction from [AuCl(PPh3)] or [(AuCl) 2(μ2-P^P)]. X-Ray crystallography of [(η5-C 5Me5) Ir(S2N2)Au(PPh 3)][ClO4] and [{(η5-C5Me 5)Ir(S2N2)Au}2(η 2-dppm)][ClO4]2 confirms auration of the metal-bound nitrogen atom of the MS2N2 ring. π-Stacking of theMS2N2 rings occurs within both structures.
Luminescent gold(i) macrocycles with diphosphine and 4,4'-bipyridyl ligands
Brandys, Marie-Claude,Jennings, Michael C.,Puddephatt, Richard J.
, p. 4601 - 4606 (2007/10/03)
The complexes [{-Ph2P(CH2)aPPh2AuNC5H4C5H4NAu-y2l:+ [CF3CVL (/; = 1-6) were prepared as colourless, air-stable solids by reaction of silver trifluoroacetate with the corresponding precursor complex [(CH2)(Ph2PAuCl)2], and
Synthesis, characterization and electrochemical studies of the heterometallic diclusters [{Fe2(μ-CO)(CO)6(μ-PPh2)Au}2(d iphosphine)] (diphosphine=dppm, dppip, dppe, dppp)
Ferrer, Montserrat,Julia, Anna,Reina, Roser,Rossell, Oriol,Seco, Miquel,De Montauzon, Dominique
, p. 147 - 153 (2007/10/03)
Treatment of [(ClAu)2(diphosphine)] {diphosphine=bis(diphenylphosphino)methane (dppm), bis(diphenylphosphino)isopropane (dppip), 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-bis(diphenylphosphino)propane (dppp)} with two equivalents of the anion [Fe2(μ-CO)(CO)6(μ-PPh2)]- in the presence of TlBF4 gives the new heterometallic diclusters [{Fe2(μ-CO)(CO)6(μ-PPh2)Au}2(d iphosphine)] that have been isolated and characterized. Their 31P-NMR spectra show different patterns as a function of the diphosphine ligand. The electrochemical behavior of these compounds has been investigated and compared with that of the mono- [Fe2(μ-CO)(CO)6(μ-PPh2)(μ-AuPPh3)] and tricluster [{Fe2(μ-CO)(CO)6(μ-PPh2)Au}3(t riphos)] derivatives.
