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Cyclic Hydroboration – The Structure of Perhydro‐9b‐boraphenalenes
Author(s) -
Wrackmeyer Bernd,
Schödel Christine,
Kempe Rhett,
Glatz Germund,
Noor Awal
Publication year - 2016
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201600224
Subject(s) - hydroboration , boranes , chemistry , boron , nuclear magnetic resonance spectroscopy , stereochemistry , crystallography , organic chemistry , catalysis
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 ( 11 B, 13 C, 15 N and 23 Na 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.