Natriumselenoborato‐closo‐dodekaborate

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

“…The boron-selenium bond lengths, B1-Se1 and B4-Se2, are equal, 1.92 and 1.93 Å, respectively. However, they are significantly shorter as compared to those observed in other selenaborane clusters [16,19,23,24]. This may be due to the tendency of boron and selenium atoms to form polarized bonds that have a localized two-center character resulting in the observed distances [44,45].…”

“…Apart from the carboranes and metallacarboranes, the most wide-ranging maingroup polyhedral heteroboranes are thiaboranes and thiametallaboranes. By contrast, polyborane-based boron containing clusters that also contain other group 16 elements as a cluster constituent are less [15][16][17][18][19][20][21][22][23][24][25].…”

Neue Kronenether‐stabilisierte Oxoniumhalogenochalkogenate: [H3O(Dibromo‐benzo‐18‐Krone‐6)]2[Se3Br10] und [H5O2(Bis‐dibromo‐dibenzo‐24‐Krone‐8]2[Se3Br8]

“…[Se 4 Br 12 ] 2Ϫ [21,23] (vgl. auch [1,2] Br 10 ] [28] und [H 7 O 3 (Bisdibromo-dibenzo-30-Krone-10)][Se 2 Br 9 ] · 1,5CH 2 Cl 2 [14] berichtet. Im Bereich der Halogenoselensäuren konnten wir nun zwei neuartige Oxonium-Kronenether-Komplexe der Bromoselenate [Se 3 Br 10 ] 2Ϫ und [Se 3 Br 8 ] 2Ϫ mit aromatisch annelierten sterisch eingeschränkten Kronenethern kristallin isolieren.…”