Dianion eines Methylendiborirans, Synthese seiner Alkali- und Magnesiumsalze und Struktur seines Dikaliumsalzes / Dianion of a Methylenediborirane, Synthesis of its Alkali and Magnesium Salts and Structure of its Dipotassium Salt
Open Access
- 1 July 1988
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 43 (7) , 801-806
- https://doi.org/10.1515/znb-1988-0703
Abstract
Lithium, sodium, potassium, caesium and magnesium salts of the dianion of 1,2-di-tert-butyl-3- [bis(trimethylsilyl)methylene]-1,2-diborirane have been synthesized and charactarized by 13C and 11B NMR spectroscopy. X-ray structure analysis of the di-potassium salt proves cyclic derealization of two. π-electrons in the CB2-ring by short C-B (150 pm) and B -B (158 pm) bonds. The exocyclic C-C bond (150 pm) is bridged by two potassium ions. One of them contacts the boron atoms of a neighbouring dianion leading to a helicoidal infinite chain with 41-symmetry along the c direction.Keywords
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