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Synthesis of Tellurasila Cycles Containing an Annelated Dicarba‐ closo ‐dodecaborane(12) Unit: Structure of a 1,4‐Ditellura‐2,3‐disilacyclohexane Derivative
Author(s) -
Wrackmeyer Bernd,
Klimkina Elena V.,
Milius Wolfgang
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201201124
Subject(s) - chemistry , moiety , tellurium , ring (chemistry) , carborane , derivative (finance) , hydrolysis , crystallography , stereochemistry , medicinal chemistry , organic chemistry , financial economics , economics
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‐C 2 B 10 H 10 )Te 2 Li 2 ](Et 2 O) 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‐C 2 B 10 H 10 )Te 2 Li 2 ](Et 2 O) 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).