Hexa‐ and Octagold Chains from Flexible Tetragold Molecular Units Supported by Linear Tetraphosphine Ligands

Abstract

A flexible building block: Flexible tetragold(I) chain complexes supported by a new single methylene-bridged tetraphosphine ligand were synthesized and further transformed into discrete linear octagold(I) {Au(8)} and cyclic hexagold(I) {Au(6)} structures by reaction with KI and NaAuCl(4), respectively (see picture, Au purple, Cl dark green, PF(6) light green, I pink). The tetragold complexes are also luminescent at room temperature.

Construction of a Planar Tetrapalladium Cluster by the Reaction of Palladium(0) Bis(isocyanide) with Cyclic Tetrasilane

“…To overcome these drawbacks, a new methodology called template synthesis has recently been introduced [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. In this method, the products are synthesized by clustering multiple metal atoms To overcome these drawbacks, a new methodology called template synthesis has recently been introduced [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28].…”

“…In this method, the products are synthesized by clustering multiple metal atoms To overcome these drawbacks, a new methodology called template synthesis has recently been introduced [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. In this method, the products are synthesized by clustering multiple metal atoms on the template.…”

“…The structure of the clusters obtained in this method is highly controllable by using template molecules with appropriate structures; the yield of the product is generally high. Using this synthetic strategy, many transition metal clusters having 1D chain-like structures have been prepared by employing polyenes [10][11][12][13], multidentate phosphines [14][15][16][17], and nitrogen-containing compounds as templates [18][19][20][21][22]. Similarly, the use of (poly)cyclic aromatic hydrocarbons as a template led to the formation of metal clusters with 2D sheet-like structures [23][24][25][26][27][28].…”

Synthesis and Characterization of Linear Tetranuclear Silver(I) Complexes Bridged by Tetraphosphane Ligands

“…with respect to the Ag 4 chain (Figure 2) and not in a syn arrangement as is usually observed in Au I and Cu I tetranuclear complexes [12,13] and in 1, 2a, and 3. Complex 4 is, thus, the first example of a tetrasilver core in which two dpmppm are in an anti arrangement.…”

“…[10,11] Recently, we have been successful in preparing a new tetraphosphane ligand, meso-bis [(diphenylphosphanylmethyl)phenylphosphanyl]methane (meso-1,1, 3,5,7,7-hexaphenyl-1,3,5,7-tetraphosphaheptane, abbreviated as dpmppm), in which each phosphorus atom is bridged by a methylene unit. The tetraphosphane dpmppm has proven to be very effective in constructing a bent tetragold(I) chain, as in [Au 4 (µ-dpmppm) 2 ]XXЈ 3 (X = Cl, XЈ = PF 6 , BF 4 ; X = XЈ = PF 6 ), [12] where two dpmppm ligands are disposed in a syn arrangement with respect to the Au 4 chain. The flexible tetragold(I) chain shows an interesting fluorescent behavior, which can be switched by capturing a chloride anion, and was further converted into the cyclic hexagold(I) complexes [Au 6 Cl 4 (µ-dpmppm) 2 ]X 2 (X = Cl, PF 6 ) and the linear octagold(I) complex [Au 8 (µ-I) 2 (µ 3 -I) 2 (µ-dpmppm) 4 ](PF 6 ) 4 .…”