QUELQUES ACIDES DE BRØNSTED DANS LES COORDINENCES ELEVEES DU PHOSPHORE ET DU BORE

Abstract

Some hydridospirophosphoranes and hydroxyspirophosphoranes bearing α-hydroxy acid ligands have been prepared. Their pK _as have been evaluated in DMF and DMSO solution. Hydroxyphosphoranes are strong BrØnsted acids whereas hydridophosphoranes are weaker. Nevertheless, they remain stronger than the related hydridophosphoranes. On the other hand, we prepared some spiroboronates similar to the hydroxyphosphoranes . Their pK _as again correspond to strong acids.