Abstract
Reduction of [(BuP)-P-t](4\) with K metal (1:5 equiv,) followed by the addition of pmdeta and stoichiometric hydrolysis gives [(((BuP)-P-t)(2)H}K . pmdeta](2), a unique complex containing a [(BuP)-P-t(H)PBut](-) anion ligand homologous with a phosphido anion (R2P-).