Synthesis and Crystal Structure of a Salt Containing _∞¹{Zn[trans‐μ₂(η³:η³‐Ge₉)]}^2– Anions: A Polymer with Ge₉ Zintl Clusters Bridged by Zn Atoms

Abstract

The MgBr2‐catalyzed formal [3+2] cycloaddition of donor–acceptor activated cyclopropanes with nitrosoarenes offers a novel approach to various structurally diverse isoxazolidines. The reactions, which are experimentally easy to conduct, occur with complete stereospecificity and perfect control of regioselectivity. Product isoxazolidines can be readily transformed into α‐amino lactones by reductive or decarboxylative NO cleavage and subsequent lactonisation, and the N‐aryl bond cleavage is also possible under oxidative conditions.

BiZn Bond Formation in Liquid Ammonia Solution: [BiZnBi]4−, a Linear Polyanion that is Iso(valence)‐electronic to CO2

“…[16] Furthermore, [Zn 2 (Mesnacnac) 2 ] disproportionates in liquid ammonia with subsequent formation of Zn metal and Zn II species. [17] Triggered by our results on the formation of [Bi 4 ] 6À , which is the polyanion with the highest negative charge per atom obtained in solution, [18] (1) and Ba 2 ZnBi 2 (2), [8] respectively. polymer obtained by the reaction of [Ge 9 ] 4À with [Zn 2 (Mesnacnac) 2 ] that contains a [Zn À Zn] 2+ unit, [17] we investigated the reactivity of polybismuthide-containing solutions with Zn I organyls.…”

“…[17] Triggered by our results on the formation of [Bi 4 ] 6À , which is the polyanion with the highest negative charge per atom obtained in solution, [18] (1) and Ba 2 ZnBi 2 (2), [8] respectively. polymer obtained by the reaction of [Ge 9 ] 4À with [Zn 2 (Mesnacnac) 2 ] that contains a [Zn À Zn] 2+ unit, [17] we investigated the reactivity of polybismuthide-containing solutions with Zn I organyls. We have shown recently that under similar experimental conditions the reaction of [Ge 9 ] 4À with Zn I compounds leads to the polymeric 1 1 [Zn(Ge 9 )] 2À anion, [17] whereas the reaction of [Ge 9 ] 4À with the Zn II compound Zn(C 6 H 5 ) 2 leads to [(C 6 H 5 )Zn(h 4 -Ge 9 )] 3À .…”

“…polymer obtained by the reaction of [Ge 9 ] 4À with [Zn 2 (Mesnacnac) 2 ] that contains a [Zn À Zn] 2+ unit, [17] we investigated the reactivity of polybismuthide-containing solutions with Zn I organyls. We have shown recently that under similar experimental conditions the reaction of [Ge 9 ] 4À with Zn I compounds leads to the polymeric 1 1 [Zn(Ge 9 )] 2À anion, [17] whereas the reaction of [Ge 9 ] 4À with the Zn II compound Zn(C 6 H 5 ) 2 leads to [(C 6 H 5 )Zn(h 4 -Ge 9 )] 3À . [19] Thus the employment of Zn I compounds had a dramatic influence on the product formation which has been attributed to a disproportionation reaction of the Zn I compound.…”

“…[19] Thus the employment of Zn I compounds had a dramatic influence on the product formation which has been attributed to a disproportionation reaction of the Zn I compound. [17] Therefore we modified the known reaction of solutions of K 5 Bi 4 with Zn(C 6 H 5 ) 2 , which occurred with formation of [Zn@-(Zn 8 Bi 4 )@Bi 7 ] 5À , [20] and replaced [Zn(C 6 H 5 ) 2 ] by Zn I compounds as reactants. The reaction of [Zn 2 (Mesnacnac) 2 ] with K 3 Bi 2 and K 5 Bi 4 in liquid ammonia in the presence of [18] Scheme 2).…”

Metal‐Centered Zintl Ions Isolated by Direct Extraction from Endohedral Intermetallic Precursor: [Co1–x@Sn9]4– (x ≈ 0.32) and [Co2@Sn17]5–

“…[22,35] Regarding metal-linked clusters, [(Ge 9 Cu)(Ge 9 )] 7-adopted η 4+1 connection, [36] exobonded clusters [Sn 9 AgSn 9 ] 5-, [38] [Au 3 Ge 18 ] 5-with triangular metals joint, [39] large aggregation clusters [Au 3 Ge 45 ] 9-, [40] [Pb 9 CdCdPb 9 ] 6-with double metal linkage, [41] discrete chains [Hg 3 (Ge 9 ) 4 ] 10-, [42] two infinite chains [Ge 9 Hg] 2-, [43] discrete particles [Sn 9 HgSn 9 ] 6-, [44] and a polymer [Zn(Ge 9 )] 2-adopting η 3 +η 3 connection have been reported. [45] Group 14 element Zintl clusters that are centered with transition metal atoms, namely endohedral Zintl ions, are commonly obtained by the reaction of a solution of the respective A 4 E 9 phase with organometallic compounds. [46] [27] In this work we report on more products we obtained from solutions of K 4.79 Co 0.79 Sn 9 -a Co-filled Sn 9 (3) were obtained after heating the filtrate/toluene mixture to 70°C and storing the solution for several weeks at room temperature.…”