[C<sub>6</sub>F<sub>5</sub>Xe]<sup>+</sup> and [C<sub>6</sub>F<sub>5</sub>XeNCCH<sub>3</sub>]<sup>+</sup> Salts of the Weakly Coordinating Borate Anions, [BY<sub>4</sub>]<sup>−</sup> (Y = CN, CF<sub>3</sub>, or C<sub>6</sub>F<sub>5</sub>)
作者:Karsten Koppe、Hermann-J. Frohn、Hélène P. A. Mercier、Gary J. Schrobilgen
DOI:10.1021/ic702259c
日期:2008.4.1
New examples of [C6F5Xe]+ salts of the weakly coordinating [BY4]- (Y = CN, CF3, or C6F5) anions were synthesized by metathesis of [C6F5Xe][BF4] with MI[BY4] (MI = K or Cs; Y = CN, CF3, or C6F5) in CH3CN at -40 degrees C, and were crystallized from CH2Cl2 or from a CH2Cl2/CH3CN solvent mixture. The low-temperature (-173 degrees C) X-ray crystal structures of the [C6F5Xe]+ cation and of the [C6F5XeNCCH3]+
弱配位的[BY4]-(Y = CN,CF3或C6F5)阴离子的[C6F5Xe] +盐的新实例是通过[C6F5Xe] [BF4]与MI [BY4]的复分解合成的(MI = K或Cs; Y = CN,CF3或C6F5)在-40摄氏度的CH3CN中,并从CH2Cl2或CH2Cl2 / CH3CN溶剂混合物中结晶。报告了[C6F5Xe] [B(CF3)4],[C6F5XeNCCH3] [[C6F5Xe] +阳离子和[C6F5XeNCCH3] +加合物的低温(-173摄氏度)X射线晶体结构[ B(CF3)4],[C6F5Xe] [B(CN)4]和[C6F5XeNCCH3] [B(C6F5)4]。在每个结构中,[C6F5Xe] +阳离子均与阴离子或溶剂发生相互作用,其中[B(CF3)4]-阴离子的阳离子-阴离子相互作用最弱。[C6F5Xe] +和[C6F5XeNCCH3] +盐的固态拉曼光谱已借助电子