close

Вход

Забыли?

вход по аккаунту

?

код для вставки
2005
Structure
D 2000
11- 012
A Novel Crown-Ether Stabilized Oxonium Halogenochalcogenate(IV): [H7O3(Bis-dibromo-dibenzo-30-crown-10)][Se2Br9]�5CH2Cl 2. ? Single crystals of the title
compound are isolated from a solution of SeBr4 and dibenzo-30-crown-10 in MeCN/
CH2Cl 2 containing a small amount of aq. HBr. The crown ether is brominated by HBr
during the reaction. [H7O3(bis-dibromo-dibenzo-30-crown-10)][Se2Br9]�5CH2Cl2
crystallizes in the monoclinic space group P21/n with Z = 4 and is a new example of a
supramolecular halogenochalcogeno acid. The large dibenzo--30-crown-10 ring is able
to stabilize the trinuclear [H7O3]+ cation in its cavity. The [Se 2Br 9]- anion consists of
two face-shared SeBr6 octahedra and has nearly D3h symmetry. ?
(HAMMERSCHMIDT, A.; BECKMANN, I.; LAEGE, M.; KREBS*, B.; Z. Naturforsch., B: Chem. Sci. 50 (2004) 11-12, 1438-1443; Inst. Anorg. Anal. Chem.,
Westfael. Wilhelms-Univ., D-48149 Muenster, Germany; Eng.) ? Schramke
Документ
Категория
Без категории
Просмотров
0
Размер файла
10 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа