TY  - JOUR
AU  - Bamberg, Marcel
AU  - Gasevic, Thomas
AU  - Bolte, Michael
AU  - Virovets, Alexandr
AU  - Lerner, Hans-Wolfram
AU  - Grimme, Stefan
AU  - Bursch, Markus
AU  - Wagner, Matthias
TI  - Brominated [20]silafulleranes: pushing the limits of steric loading
JO  - Chemical communications
VL  - 59
IS  - 48
SN  - 0022-4936
CY  - Cambridge
PB  - Royal Society of Chemistry
M1  - PUBDB-2023-03845
SP  - 7459 - 7462
PY  - 2023
AB  - 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>].
LB  - PUB:(DE-HGF)16
C6  - 37254708
UR  - <Go to ISI:>//WOS:001005244200001
DO  - DOI:10.1039/D3CC02142D
UR  - https://bib-pubdb1.desy.de/record/586214
ER  -