ISSN:
0044-2313
Schlagwort(e):
Chemistry
;
Inorganic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Beschreibung / Inhaltsverzeichnis:
Several methods for the preparation of zinc tetrahydridoborate are discussed. Pure products are obtained by treating zinc methoxide with diborane in the presence of ether or tetrahydrofurane (THF). Association of Zn(BH4)2 in THF is established by electrical conductivity and transference number measurements.Zinc tetrahydridoborate resembles zinc bromide in its behaviour towards neutral donor molecules. Complexes of type Zn(BH4)2 · 2 D (D = THF, NC5H5, N(CH3)3) contain covalently bonded BH4- groups, while BH4-ions are present in Zn(BH4)2 · 4 D (D = NH3 and NH2CH3) which are best represented by the formula [ZnD4](BH4)2.
Notizen:
Die Darstellung von Zinkboranat, Zn(BH4)2, nach der Diboran-Zinkmethoxid-Reaktion liefert in Gegenwart von Äther oder Tetrahydrofuran (THF) die reinsten Präparate. Elektrochemische Untersuchungen an Zn(BH4)2-Lösungen in THF beweisen den autokomplexen Charakter von Zn(BH4)2.Mit Neutralbasen reagiert Zn(BH4)2 wie Zinkbromid. Verbindungen des Typs Zn(BH4)2 · 2 D (D = THF, NC5H5, N(CH3)3) enthalten kovalent gebundene BH4- Gruppen, während Verbindungen des Typs Zn(BH4)2 · 4 D (D = NH3 und NH2) als [ZnD4](BH4)2 zu formulieren sind.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/zaac.19693700502
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