Cyclic Hydroboration - The Structure of Perhydro-9b-boraphenalenes

Cyclic Hydroboration - The Structure of Perhydro-9b-boraphenalenes

Complete hydroboration of cyclododecatrienes was reported to give two isomers, depending on conditions. The assignment of their structure had been attempted without unequivocal proofs. We have now used NMR spectroscopy (11B, 13C, 15N and 23Na NMR) to study the sodium amides of these two polycyclic b...

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Veröffentlicht in:Zeitschrift für anorganische und allgemeine Chemie (1950) 2016-08, Vol.642 (17), p.922-924
Hauptverfasser: Wrackmeyer, Bernd, Schödel, Christine, Kempe, Rhett, Glatz, Germund, Noor, Awal
Format: Artikel
Sprache:eng
Schlagworte:
Hydroboration
NMR spectroscopy
Polycycles
X-ray crystallography
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Zusammenfassung:Complete hydroboration of cyclododecatrienes was reported to give two isomers, depending on conditions. The assignment of their structure had been attempted without unequivocal proofs. We have now used NMR spectroscopy (11B, 13C, 15N and 23Na NMR) to study the sodium amides of these two polycyclic boranes. In addition, one of the isomeric borates could be crystallized, and the X‐ray analysis revealed a cis‐,cis‐,trans configuration of the six‐membered rings reversing the original structural assignment.
ISSN:0044-2313
1521-3749
DOI:10.1002/zaac.201600224