Organophosphoryl adducts of tris(pentafluorophenyl)borane; crystal and molecular structure of B(C6F5)(3)center dot Ph3PO

A series of 1 : 1 adducts of B(C6F5)(3) with the organophosphoryl ligands Et3PO, Ph3PO, (Pr3PO)-P-n, Oct(3)(n)PO, (MeO)(3)PO, (EtO)(3)PO, (PhO)(3)PO, (EtO)(2)(H)PO, ((BuO)-O-n)(2)(H)PO, (PhO)(2)(H)PO, (MeO)(2)MePO, (EtO)(2)MePO, (EtO)(2)PhPO, and (EtO)Me2PO have been synthesized and characterised by elemental analysis, mp, and spectroscopic (H-1, C-13, B-11, F-19, P-31 NMR and IR) methods. B(C6F5)(3). Ph3PO was further characterised in the solid state by a single-crystal X-ray diffraction study. P-31 NMR chemical shifts and nu (PO) IR stretching frequencies are discussed in relation to substituent at phosphorus.