1309478-15-6Relevant articles and documents
Design and synthesis of polytopic metalloligands based on fluoroaryl gold(I) organometallic compounds
Ferrer, Montserrat,Gutierrez, Albert,Mounir, Mounia,Rodriguez, Laura,Rossell, Oriol,Font-Bardia, Merce,Gomez-Sal, Pilar,Martin, Avelino,Solans, Xavier
, p. 3419 - 3429 (2011/08/07)
New neutral and anionic fluoroaryl gold(I) complexes featuring terminal pyridine rings were prepared following different strategies. The homoleptic anionic compounds NBu4[Au(C5F4N)2] (1) and NBu4[Au(C6F4py)2] (2) were obtained by reacting [AuCl(tht)] (tht = tetrahydrothiophene) with the organolithium derivatives of BrC5F4N and BrC 6F4py, respectively. This route required the previous synthesis of the new fluorinated compound BrC6F4py, which was produced by a Stille cross-coupling between (4-pyridyl)trimethylstannane and 1,4-dibromotetrafluorobenzene. The neutral phosphane compounds [Au(C 6F4N)(PPh3)] (3) and [Au(C6F 4py)(PPh3)] (4) were obtained by treatment of [AuCl(PPh3)] with the organolithium reagents LiC6F 4N and LiC6F4py, respectively. However, this synthetic strategy failed for organogold compounds containing a polyphosphane ligand. Consequently, an alternative synthetic procedure, based on displacement reactions of the weakly coordinated tht ligand from [Au(C6F 4py)(tht)] by the appropriate polyphosphane, was undertaken. Thus, the following complexes were isolated and characterized: [(AuC6F 4py)2(μ2-diphosphane)] [diphosphane = bis(diphenylphosphanyl)methane (dppm) (9), 2,2-bis(diphenylphosphanyl)propane (dppip) (10), 1,2-bis(diphenylphosphanyl)ethane (dppe) (11), trans-1,2-bis(diphenylphosphanyl)ethylene (dppet) (12), 1,2- bis(diphenylphosphanyl)acetylene (dppa) (13), 1,3-bis(diphenylphosphanyl)propane (dppp) (14), 1,4-bis(diphenylphosphanyl)butane (dppb) (15), 4,4′-bis(diphenylphosphanyl)-1,1′-biphenyl (dppdph) (16)], [(AuC6F4py)3(μ3-triphosphane)] [triphosphane = 1,1,1-tris(diphenylphosphanylmethyl)ethane (triphos) (17), 1,3,5-tris(diphenylphosphanyl)benzene (triphosph) (18)], and [(AuC 6F4py)4(μ4-tetraphosphane)] [tetraphosphane = tetra(diphenylphosphanyl)methane (tetraphos) (19), 1,2,3,5-tetra(diphenylphosphanyl)benzene (tetraphosph) (20)]. Coordination reaction assays of compounds 1, 2, 3, and 4 with [M(diphosphane)(H 2O)2](OTf)2 (M = Pd, Pt) were performed in order to test their potential as building blocks in the self-assembly of discrete species. The crystal structures of compounds BrC6F 4py, 1, 4, 17, and 19 were determined. Extensive noncovalent interations, particularly fluorine interactions such as C- F???πF, C-F???H, and F???F, have been found to influence the molecular packing of these species.
