Thiaborane Icosahedral Barrier Increased by the Functionalization of all Terminal Hydrogens in closo-1-SB11H11.

Inorganic Chemistry
Mario BakardjievDrahomír Hnyk

Abstract

The electrophilic substitution of icosahedral closo-1-SB11H11 with methyl iodide has resulted in two B-functionalized thiaboranes, 7,12-I2-2,3,4,5,6,8,9,10,11-(CH3)9-1-closo-SB11 and 7,8,12-I3-2,3,4,5,6,9,10,11-(CH3)8-closo-1-SB11, with the former being significantly predominant. These two icosahedral thiaboranes are the first cases of polysubstituted polyhedral boron clusters with another vertex that differs from B and C. Such polyfunctionalizations have increased the earlier observed thiaborane icosahedral barrier, not exhibiting any reactivity toward bases, unlike the parent thiaborane. The search for methylation pathways has revealed that the complete B11-methylation is impossible, like in the case of decaborane(14), where this seems to be a result of the positively charged upper parts of these two molecules.

References

Jul 21, 2005·Journal of the American Chemical Society·Francesc TeixidorClara Viñas
Jul 30, 2014·Angewandte Chemie·Jindřich FanfrlíkPavel Hobza
Jan 31, 2015·The Journal of Physical Chemistry. a·Adam PecinaJindřich Fanfrlík
Jul 24, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Mario BakardjievBohumil Štíbr
Mar 1, 2019·Chemical Communications : Chem Comm·Jan VránaAleš RůŽička

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