Cover Feature: Polycations Stabilised by Borosulfates: [Au₃Cl₄][B(S₂O₇)₂] and the One‐Dimensional Metal [Au₂Cl₄][B(S₂O₇)₂](SO₃) (Chem. Eur. J. 22/2022)

Abstract

Single crystals of [Au3Cl4][B(S2O7)2] and [Au2Cl4][B(S2O7)2](SO3) were obtained from a solvothermal reaction with SO3, and their electronic properties were investigated by means of density functional theory–based calculations. [Au3Cl4][B(S2O7)2] exhibits a cluster‐like cation, and the cationic gold–chloride strands in [Au2Cl4][B(S2O7)2](SO3) are found to resemble one‐dimensional metallic wires; this was further confirmed by polarization microscopy. More information can be found in the Research Article by B. Rasche, J. Bruns et al. (DOI: 10.1002/chem.202200004).

Stabilizing the Homopolycation (I4)2+ with a Hexasulfate in (I4)[S6O19] and a Borosulfate in (I4)[B(S2O7)2]2

“…[35,36,37] and even more recently we reported on two highly untypical heteropoly AuÀ Cl cations stabilized by [B-(S 2 O 7 ) 2 ] 2 À anions. [38] As described for the fluorides (I 4 )[AsF 6 ] 2 , (I 4 )[SbF 6 ] 2 , and (I 4 )[Sb 3 F 14 ][SbF 6 ], respectively, the (I 4 ) 2 + cation in both compounds has a rectangular shape with two short and two longer bonds (Figure 3). In (I 4 )[S 6 O 19 ] the short bonds show a value of 260.8(3) pm while the longer edge of the rectangle is 322.1(1) pm long.…”

“…Examples are known, for example, for the alkaline metals and silver in M [B(S 2 O 7 ) 2 ] ( M =Li, Na, K, Ag) [35,36,37] . and even more recently we reported on two highly untypical heteropoly Au−Cl cations stabilized by [B(S 2 O 7 ) 2 ] 2 − anions [38] …”

Trendbericht Festkörperchemie 2023

“…Gemäß relativistischer Bandstrukturrechnungen wird ein Material mit eindimensionaler metallischer Leitfähigkeit entlang der Au-enthaltenden Kationenstränge erwartet. 60) Die subtilen strukturdirigierenden Einflüsse freier Elektronenpaare haben Steinberg und Mitarbeiter mit quantenchemischen Studien an BaLaCuTe 3 und BaGdCuTe 3 als Prototypen dieser Verbindungsklasse beschrieben. Zudem stellten sie BaCeCuTe 3 und BaDyAgTe 3 her, zwei weitere Vertreter der Reihe (Abbildung 10).…”

Photoluminescence of Mn2+ in the Borosulfate Zn[B2(SO4)4] : Mn2+—A Tool to Detect Weak Coordination Behavior of Ligands

“…[61] The special reaction conditions during the synthesis as well as the weak coordination behavior of the borosulfate anions are most likely also the reason for the stabilization of the cluster-like heteropolycations in [Au 3 Cl 4 ][B(S 2 O 7 ) 2 ] and the chain-like heteropolycations in [Au 2 Cl 4 ][B(S 2 O 7 ) 2 ](SO 3 ). [62] Spectroscopic evidence for the weak coordination behavior of borosulfates has so far been mainly related to the luminescence of lanthanoid ions such as Ce 3 + or the UV/Vis absorption of transition metal ions such as Co 2 + or Ni 2 + . [48,50,63] Based on these promising findings, it was our goal to demonstrate that weakly coordinating ligands can be beneficially employed to tune the photoluminescence properties of Mn 2 + for alternative lighting sources in a desirable manner and that the covalency of the Mn-ligand bond plays an equally important role in controlling of the ligand field strength.…”