Adducts of the Lewis acid [B(C_6F_5)_3] with transition metal oxo compounds

摘要

The oxo anions [WO_4]~(2-) and [ReO_4]~- react with the Lewis acid molecule [B(C_6F_5)_3] to give the tris-adduct [WO{OB(C_6F_5)_3}_3]~(2-) or the mono adduct [ReO_3{OB(C_6F_5)_3}]~- respectively. The crystal structure of the salt [~nPr_4N]_2[WO{OB(C_6F_5)_3}_3] has been determined. The #eta#-cyclopentadienyl-oxo compounds [Re(#eta#-C_5R_5)O_3] (where R=H or Me) react with [B(C_6F_5)_3] giving the mono adducts [(#eta#-C_5R_5)ReO_2{OB(C_5R_5)_3}] and the crystal structure of the compound where R=H has been determined. the triazacyclononane compounds [LMO_3] (where L=N, N', N"-trimethyl-1, 4, 7-triazacyclononane and M=Mo or W) with [B(C_6R_5)_3] give the mono adducts [LMO_2{OB(C_6R_5)_3}] and the crystal structure of the tungsten compound is reported. The compound [Re{HB(pz)_3}O_3] [where {HB(pz)_3}=hydridotris (1-pyrazolyl) borate][B(C_6R_5)_3] gives the mono adduct [HB(pz)_3ReO_2{OB(C_6R_5)_3}].