The first 5-substituted trihydro(azolyl)borate system, the sodium trihydro(5-CF3-pyrazol-1-yl)borate, Na[H3B(5-(CF3)pz)], has been synthesized by the reaction of 3-trifuoromethyl-pyrazole with NaBH4 in high yield. Na[H3B(5-(CF3)pz)] reacts with AgNO3 in the presence of monodentate tertiary phosphanes PR3 (PR3 = P(C6H5)(3), P(p-C6H4CH3)(3), P(m-C6H4CH3)(3), P(o-C6H4CH3)(3), or PCH3(C6H5)(2)) to afford silver(l) bis(phosphane) adducts. These compounds have been characterized by elemental analyses, FTIR, ESI-MS, and multinuclear (H-1, F-19, and P-31) NMR spectroscopy. Solid-state structures of {[H3B(5-(CF3)pz)]Ag[P(C6H5)(3)](2)} and {[H3B(5-(CF3)pz)]Ag[P(p-C6H4CH3)(3)](2)} are also reported. They feature kappa(2)-N,H-bonded trihydro(pyrazolyl)borate ligands and pseudo-tetrahedral silver atoms.
Small scorpionate ligands: Silver(I)-Organophosphane complexes of 5-CF3-Substituted scorpionate ligand combining a B-H...Ag coordination motif
PELLEI, Maura;SANTINI, Carlo
2007-01-01
Abstract
The first 5-substituted trihydro(azolyl)borate system, the sodium trihydro(5-CF3-pyrazol-1-yl)borate, Na[H3B(5-(CF3)pz)], has been synthesized by the reaction of 3-trifuoromethyl-pyrazole with NaBH4 in high yield. Na[H3B(5-(CF3)pz)] reacts with AgNO3 in the presence of monodentate tertiary phosphanes PR3 (PR3 = P(C6H5)(3), P(p-C6H4CH3)(3), P(m-C6H4CH3)(3), P(o-C6H4CH3)(3), or PCH3(C6H5)(2)) to afford silver(l) bis(phosphane) adducts. These compounds have been characterized by elemental analyses, FTIR, ESI-MS, and multinuclear (H-1, F-19, and P-31) NMR spectroscopy. Solid-state structures of {[H3B(5-(CF3)pz)]Ag[P(C6H5)(3)](2)} and {[H3B(5-(CF3)pz)]Ag[P(p-C6H4CH3)(3)](2)} are also reported. They feature kappa(2)-N,H-bonded trihydro(pyrazolyl)borate ligands and pseudo-tetrahedral silver atoms.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
