Köster, Roland; Seidel, Günter; Boese, Roland; Wrackmeyer, Bernd:
Ein tricyclisches Tetraboradisiladodecan aus Dimethyl-di-1-propinylsilan und Ethyldiboranen(6)
In: Zeitschrift für Naturforschung B, Journal of Chemical Sciences, Jg. 50 (1995), Heft 3, S. 439 - 447
1995Artikel/Aufsatz in ZeitschriftOA Embargo
Chemie
Damit verbunden: 1 Publikation(en)
Titel in Deutsch:
Ein tricyclisches Tetraboradisiladodecan aus Dimethyl-di-1-propinylsilan und Ethyldiboranen(6)
Titel in Englisch (übersetzt):
A Tricyclic tetraboradisiladodecane from dimethyl-di-1-propnylsilane and ethyldiboranes(6)
Autor*in:
Köster, Roland
;
Seidel, Günter
;
Boese, RolandUDE
LSF ID
10873
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Wrackmeyer, Bernd
Erscheinungsjahr:
1995
Open Access?:
OA Embargo
Scopus ID
Sprache des Textes:
Deutsch

Abstract in Englisch:

The exhaustive hydroborations of the (C.tplbond.C)-groups in Me2Si(C.tplbond.CMe)2 (A) by adding ethyldiborane(6) at room temp. is presumed to lead initially to the formation of a mixt. of the threo- and erythro-3,3,5,6-tetrakis(diethylboryl)-4,4-dimethyl-4-silaheptanes (1a, b). The threo-1a reacts further by BH borane catalyzed intermol. condensation to the substituted disilatetraboratricyclo[6.2.1.16,9]dodecane I, whose crystal structure [space group C2/c, a = 19.696(2), b = 10.371(1), c = 16.580(2) .ANG.; b = 125.90(1) Deg; at 122 K] has been established by x-ray diffraction. In contrast, the erythro-1b undergoes intramol., thermal elimination of Et3B to give 1,2-diethyl-2,4-bis(diethylboryl)-3,3,5-trimethyl-3-silaborolane II. If A is added to excess of undiluted (Et2BH)2, then two substituted diastereomers of 1-carba-arachno-pentaboranes(10), are formed preferentially as the result of an initial Si-C.tplbond.-cleaved hydroboration.