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XeF2 Coordination Complexes of the [BrO2]+ Cation, [O2Br(FXeF)n][AsF6] (n = 1, 2) and [O2Br(FXeF)2][SbF6]; Their Syntheses and Structural Characterizations
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-06-02 , DOI: 10.1021/acs.inorgchem.3c01030
Mark R Bortolus 1 , Griffin J LaChapelle 1 , Hélène P A Mercier 1 , Jamie Haner 1 , Gary J Schrobilgen 1
Affiliation  

The syntheses and structural characterizations of the first XeF2 coordination complexes of the [BrO2]+ cation are described. The reactions of [BrO2][PnF6] (Pn = As, Sb) with XeF2 in anhydrous HF solvent yield the salts [O2Br(FXeF)n][AsF6] (n = 1, 2) and [O2Br(FXeF)2][SbF6], which were characterized by low-temperature (LT) Raman spectroscopy and single-crystal X-ray diffraction (SCXRD). The XeF2 ligands and [PnF6] coordinate to the Lewis acidic [BrO2]+ cation through primarily electrostatic BrV---FXe σ-hole bonds that result from coordination of the F atoms into regions of high positive electrostatic potential on the Br(V) atom and have bond trajectories that avoid the stereoactive valence electron lone-pair of Br(V). The complexes and their structural characterizations by LT Raman spectroscopy and SCXRD significantly extend the coordination chemistry of Br(V) and provide rare examples of a noble-gas difluoride coordinated to a strong oxidant main-group Lewis acid center.

中文翻译:

[BrO2]+ 阳离子的 XeF2 配位化合物,[O2Br(FXeF)n][AsF6] (n = 1, 2) 和 [O2Br(FXeF)2][SbF6];它们的合成和结构表征

描述了[BrO 2 ] +阳离子的第一个 XeF 2配位络合物的合成和结构表征。[BrO 2 ][PnF 6 ] (Pn = As, Sb) 与 XeF 2在无水 HF 溶剂中的反应产生盐 [O 2 Br(FXeF) n ][AsF 6 ] ( n = 1, 2) 和 [ O 2 Br(FXeF) 2 ][SbF 6 ],通过低温 (LT) 拉曼光谱和单晶 X 射线衍射 (SCXRD) 对其进行了表征。XeF 2配体和[PnF 6 ] -主要通过静电 Br V ---F Xe σ-空穴键与路易斯酸性 [ BrO 2 ] +阳离子配位,该键由 F 原子配位到 Br(V) 原子上的高正静电势区域并具有键合避免 Br(V) 的立体活性价电子孤对电子的轨迹。配合物及其通过 LT 拉曼光谱和 SCXRD 的结构表征显着扩展了 Br(V) 的配位化学,并提供了稀有气体二氟化物与强氧化剂主族路易斯酸中心配位的罕见例子。
更新日期:2023-06-02
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