Induced Fitting and Polarization of a Bromine Molecule in an Electrophilic Inorganic Molecular Cavity and Its Bromination Reactivity
作者:Yuji Kikukawa、Kensuke Seto、Daiki Watanabe、Hiromasa Kitajima、Misaki Katayama、Shohei Yamashita、Yasuhiro Inada、Yoshihito Hayashi
DOI:10.1002/anie.202007406
日期:2020.8.17
[V12O32]4− (V12), possesses a 4.4 Å cavity entrance, and the cavity shows unique electrophilicity. Owing to the high polarizability, Br2 was inserted into V12, inducing the inversion of one of the VO5 square pyramids to form [V12O32(Br2)]4− (V12(Br2)). The inserted Br2 molecule was polarized and showed a peak at 185 cm−1 in the IR spectrum. The reaction of V12(Br2) and toluene yielded bromination of toluene
十二烷酸酯,[V 12 O 32 ] 4−(V12),具有4.4Å的腔入口,腔显示出独特的亲电性。由于高极化率,Br 2被插入到V12中,引起VO 5方锥之一的倒置以形成[V 12 O 32(Br 2)] 4-(V12(Br2))。插入的Br 2分子被极化,并且在IR光谱中的185 cm -1处显示一个峰。V12(Br2)与甲苯的反应在环上产生了甲苯的溴化反应,显示出插入的Br 2的亲电性分子。化合物V12(Br2)也与丙烷,正丁烷和正戊烷反应生成溴化烷烃。在单溴戊烷产品中,用V12(Br2)溴化显示出对3-溴戊烷的高选择性(64%),在2,,3-二溴丁烷和2,3-二溴戊烷中具有较好的苏式异构体。独特的无机空穴陷阱Br 2导致双原子分子极化。由于其新的反应场,被捕集的Br 2显示了烷烃的选择性官能化。