Synthesis and Structure of [K+-(2,2)diaza-[18]-crown-6][K3Ge9]·2Ethylenediamine: Stabilization of the Two-Dimensional Layer 2
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- 作者：Craig Downie ; Jiang-Gao Mao ; and Arnold M. Guloy
- 刊名：Inorganic Chemistry
- 出版年：2001
- 出版时间：August 27, 2001
- 年：2001
- 卷：40
- 期：18
- 页码：4721 - 4725
- 全文大小：89K
- 年卷期：v.40,no.18(August 27, 2001)
- ISSN：1520-510X
文摘
Large bright-red, transparent crystalline plates of [K-(2,2)diaza-[18]-crown-6]K3Ge9·2en are obtained, in high-yield, from a reaction of (2,2)diaza-[18]-crown-6 in toluene with a solution of K4Ge9/potassium metal (K) inethylenediamine (en). The compound crystallizes in the monoclinic space group P21/m (a = 10.740(1) Å, b =15.812(1) Å, c = 12.326(1) Å, 
= 114.74
; Z = 2). The crystal structure of [K-(2,2)diaza-[18]-crown-6]K3Ge9·2en features two-dimensional [K3Ge9] layers formed by uncomplexed K+ cations and Ge94- anions. The"not-so-bare" cluster compound features a unique Ge94- cluster that exhibits a slightly distorted C2v geometrythat is closer to D3h than the expected C4v. Use of noncryptand sequestering agents in the isolation of Ge clusteranions from en solutions opens new avenues in understanding important cation-anion interactions in the stabilityand reactivity of Zintl ions, as well as a viable route to isolating Zintl anions with higher charges per atom.
= 114.74; Z = 2). The crystal structure of [K-(2,2)diaza-[18]-crown-6]K3Ge9·2en features two-dimensional [K3Ge9] layers formed by uncomplexed K+ cations and Ge94- anions. The"not-so-bare" cluster compound features a unique Ge94- cluster that exhibits a slightly distorted C2v geometrythat is closer to D3h than the expected C4v. Use of noncryptand sequestering agents in the isolation of Ge clusteranions from en solutions opens new avenues in understanding important cation-anion interactions in the stabilityand reactivity of Zintl ions, as well as a viable route to isolating Zintl anions with higher charges per atom.