biostudies-literatureUnknown62(5)Menduti LHelicenes combine two central themes in chemistry: extended π-conjugation and chirality. Hetero-atom doping preserves both characteristics and allows modulation of the electronic structure of a helicene. Herein, we report the (BO)₂ -doped tetrathia[7]helicene 1, which was prepared from 2-methoxy-3,3'-bithiophene in four steps. 1 is formally derived by substituting two (Mes)B-O moieties in place of (H)C=C(H) fragments in two benzene rings of the parent tetrathia[7]helicene. X-ray crystallography revealed a dihedral angle of 50.26(9)° between the two terminal thiophene rings. The (P)-/(M)-1 enantiomers were separated by chiral HPLC and are configurationally stable at room temperature. The experimentally determined enantiomerization barrier of 27.4±0.1 kcal mol^-1 is loweAngewandte Chemie (International ed. in English)e202215468https://www.ebi.ac.uk/biostudies/studies/S-EPMC10107351biostudies-literature(BO)₂ -Doped Tetrathia[7]helicene: A Configurationally Stable Blue Emitter.PMC10107351Manetto SBolte MBaldoli CVillani CLicandro EWagner MLonghi GLerner HWMenduti Lfalse(BO)₂ -Doped Tetrathia[7]helicene: A Configurationally Stable Blue Emitter.Helicenes combine two central themes in chemistry: extended π-conjugation and chirality. Hetero-atom doping preserves both characteristics and allows modulation of the electronic structure of a helicene. Herein, we report the (BO)₂ -doped tetrathia[7]helicene 1, which was prepared from 2-methoxy-3,3'-bithiophene in four steps. 1 is formally derived by substituting two (Mes)B-O moieties in place of (H)C=C(H) fragments in two benzene rings of the parent tetrathia[7]helicene. X-ray crystallography revealed a dihedral angle of 50.26(9)° between the two terminal thiophene rings. The (P)-/(M)-1 enantiomers were separated by chiral HPLC and are configurationally stable at room temperature. The experimentally determined enantiomerization barrier of 27.4±0.1 kcal mol^-1 is lowe2023-01-01T00:00:00Z2023 Jan2025-07-10T03:08:21.003Z2025-04-06T11:21:00.432ZS-EPMC101073513640952310.1002/anie.202215468