Collect. Czech. Chem. Commun. 2002, 67, 1051-1060

4-Bromophenylboronate Derivatives of Ring and Cage Borosilicates

Anthony G. Aventa, Simon E. Lawrenceb, Margaret M. Meehanb, Tom G. Russellb and Trevor R. Spaldingb,*

a School of Physical and Environmental Sciences, University of Sussex, Brighton, Sussex, England, BN19QJ, U.K.
b Chemistry Department, University College, Cork, Ireland


The reactions between equimolecular amounts of 4-bromophenylboronic acid and di-tert-butylsilanediol or tert-butylsilanetriol in toluene solutions at reflux temperatures afforded the borosilicate ring compound [(4-BrC6H4B)O2Si(t-Bu)2]2 (1), and the cube-based species [(t-BuSi)4(4-BrC6H4B)4O10] (2), in medium (62%) and low (13%) yields, respectively. These compounds were characterised by microanalysis, IR and NMR (1H, 11B, 13C and 29Si) spectroscopy and single crystal X-ray crystallography. During the work-up of 2, a sample of the boroxine, [(4-BrC6H4BO)3] (3), was isolated and was characterised by single crystal diffraction.

Keywords: Borosilicate; Boroxine; Crystal structures; Inorganic rings; Inorganic cages.

References: 18 live references.