Synthesis of Tellurasila Cycles Containing an Annelated Dicarba‐closo‐dodecaborane(12) Unit: Structure of a 1,4‐Ditellura‐2,3‐disilacyclohexane Derivative
Synthesis of Tellurasila Cycles Containing an Annelated Dicarba‐closo‐dodecaborane(12) Unit: Structure of a 1,4‐Ditellura‐2,3‐disilacyclohexane Derivative
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DOI：
10.1002/ejic.201201124
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发表时间：
2013-01
影响因子：
2.3
通讯作者：
B. Wrackmeyer;E. Klimkina;W. Milius
中科院分区：
文献类型：
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作者：
B. Wrackmeyer;E. Klimkina;W. Milius
将碲插入到硫代1，2-二碳-闭合-十二硼烷（1,2）的C-Li键中，得到1，2-二碳-闭合-十二硼烷（1,2）-1，2-二碲酸酯。（1，2-C2 B10 H10）Te 2Li 2]（Et 2 O），其在与1，2-二氯四甲基二硅烷反应后得到含有Te-Si-Si-Te单元和稠合碳硼烷部分的六元杂环，通过多核磁共振和X射线结构分析表征。作为副产物，形成含有Si-Si-Te单元的五元环，其作为主要产物获得，使用有利于碲部分插入C-Li键的条件。[（1，2-C2 B10 H10）Te 2Li 2]（Et 2 O）与二甲基二氯硅烷反应，生成含Te-Te-Si单元的五元杂环。多种分解/水解/氧化产物可通过多核磁共振鉴定，其中最显著的是1，2-二（氢化碲基）-1，2-二碳-闭合-十二硼烷（12）。
Insertion of tellurium into C–Li bonds of dilithiated 1,2-dicarba-closo-dodecaborane(12) gave 1,2-dicarba-closo-dodecaborano(12)-1,2-ditellurolate [(1,2-C2B10H10)Te2Li2](Et2O) which, after reaction with 1,2-dichlorotetramethyldisilane, afforded a six-membered heterocycle containing the Te–Si–Si–Te unit with an annelated carborane moiety, characterized by multinuclear magnetic resonance and X-ray structural analysis. As a byproduct, a five-membered ring containing a Si–Si–Te unit was formed, which was obtained as a major product, using conditions favouring partial insertion of tellurium into C–Li bonds. Treatment of [(1,2-C2B10H10)Te2Li2](Et2O) with dichlorodimethylsilane led to a five-membered heterocycle as a major product containing a Te–Te–Si unit. Various decomposition/hydrolysis/oxidation products could be identified by multinuclear magnetic resonance, among them most notably 1,2-di(hydrotelluro)-1,2-dicarba-closo-dodecaborane(12).