Synthesis of a new tridentate anthracene ligand bearing (i-Pr)(2)P group at 1,8-positions: Facile bond switch on tetracoordinate boron atom

Authors
Yamashita, M Watanabe, K Yamamoto, Y Akiba, KY
Citation
M. Yamashita et al., Synthesis of a new tridentate anthracene ligand bearing (i-Pr)(2)P group at 1,8-positions: Facile bond switch on tetracoordinate boron atom, CHEM LETT, (11), 2001, pp. 1104-1105
Citations number
8
Categorie Soggetti
Chemistry
Journal title
CHEMISTRY LETTERS
ISSN journal
03667022 → ACNP
Issue
11
Year of publication
2001
Pages
1104 - 1105
Database
ISI
SICI code
0366-7022(20011105):11<1104:SOANTA>2.0.ZU;2-N
Abstract
9-Borylanthracene 12 was prepared from 1,8-bis(diisopropylphosphino)-9-brom oanthracene (5) and the X-ray structure of 12 shows a tetrahedral boron ato m coordinated by only one of the two (i-Pr)(2)P groups. However, anthracene protons were observed symmetrically in H-1 NMR even at -80 degreesC, clear ly indicating that the intramolecular bond-switching process is taking plac e very rapidly in solution.