%0 Journal Article
%A Bamberg, Marcel
%A Gasevic, Thomas
%A Bolte, Michael
%A Virovets, Alexandr
%A Lerner, Hans-Wolfram
%A Grimme, Stefan
%A Bursch, Markus
%A Wagner, Matthias
%T Brominated [20]silafulleranes: pushing the limits of steric loading
%J Chemical communications
%V 59
%N 48
%@ 0022-4936
%C Cambridge
%I Royal Society of Chemistry
%M PUBDB-2023-03845
%P 7459 - 7462
%D 2023
%X Starting from the perhydrogenated silafullerane [nBu<sub>4</sub>N][Cl@Si<sub>20</sub>(SiH<sub>3</sub>)<sub>12</sub>H<sub>8</sub>], treatment with BBr<sub>3</sub> leads to partially and exhaustively brominated clusters, [nBu<sub>4</sub>N][Cl@Si<sub>20</sub>(SiBr<sub>2</sub>H)<sub>12</sub>Br<sub>8</sub>] (120 eq.BBr<sub>3</sub>, room temperature, 30 min) and [nBu<sub>4</sub>N][Cl@Si<sub>20</sub>(SiBr<sub>3</sub>)<sub>12</sub>Br<sub>8</sub>](300 eq. BBr<sub>3</sub>, 130 8C, 3 d). Perbromination is accompanied by amassively increased steric strain on the cluster surface, whichexplains why our approach achieves regioselective derivatizationof the Si<sub>32</sub> framework when mild conditions are maintained. PartialBr/H exchange on [nBu<sub>4</sub>N][Cl@Si<sub>20</sub>(SiBr<sub>2</sub>H)<sub>12</sub>Br<sub>8</sub>] (30 eq. iBu<sub>2</sub>AlH,room temperature, 16 h) affords [nBu<sub>4</sub>N][Cl@Si<sub>20</sub>(SiH<sub>3</sub>)<sub>12</sub>Br<sub>8</sub>].
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 37254708
%U <Go to ISI:>//WOS:001005244200001
%R 10.1039/D3CC02142D
%U https://bib-pubdb1.desy.de/record/586214