Binuclear Salan borate compounds with three-coordinate boron atoms

A series of binuclear boron compounds supported by Salan(Bu)H4 ligands have been prepared. They are of the general formula Salan(Bu)[B(OR)]2. The compounds are Salean( Bu)(BOR)2 [Salean( Bu) = (N,N 0-ethylenebis(3,5-di-tert-butyl-salicylamine)), R = Me (1), SiMe3 (4)], Salban( Bu)(BOR)2[Salban( Bu) = (N,N 0-butylenebis(3,5-di-tert-butyl-salicylamine)), R = Me (2), SiMe3 (5)], and Salhan(Bu)(BOR)2 [Salhan( Bu) = (N,N 0-hexylenebis(3,5-di-tert-butyl-salicylamine)), R = Me (3)]. All of the compounds were characterized by spectroscopic (H NMR, B NMR, IR) and physical (mp, EA) techniques. Also, 1, 2 and 4 were structurally characterized by single crystal X-ray diffraction studies. 2005 Published by Elsevier B.V.