Effendy, Giancarlo Gioia Lobbia, Maura Pellei, Claudio Pettinari, Carlo Santini, Brian W. Skelton, Allan H. White
New silver(I) derivatives containing bidentate tertiary phosphines and anionic poly(pyrazol-1-yl)borates have been prepared from AgNO3 and bis(diphenylphosphino)methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-bis(diphenylphosphino)propane (dppp), 1,4-bis(diphenylphosphino)butane (dppb) or 1,1′-bis(diphenylphosphino)ferrocene (dppf) and K[H2B(pz)2], K[H2B(3,5-Me2pz)2], K[B(pz)4] or K[B(3-Mepz)4] (pzH = pyrazole); their solid state and solution properties have been investigated through analytical and spectroscopic measurements (IR, 1H and 31P NMR). The 1H and 31P NMR spectra have been interpreted with equilibria that involve mono- and di-nuclear complexes, or the presence of 1:1 and 1:2 silver-diphosphine species. The compounds are soluble in chlorinated solvents and are non-electrolytes in CH2Cl2 and acetone solutions. The structures of [(dppf){Ag(pz)2BX2}], X = H, pz have been determined by single crystal X-ray studies, the poly(pyrazolyl)borates being always bidentate with the silver(I) centers in distorted tetrahedral geometries. © 2001 Elsevier Science B.V.
Department of Chemistry, University of Western Australia, Nedlands, WA 6907, Australia; Jurusan Kimia, FMIPA Universitas Negeri Malang, Malang 65145, Jalan Surabaya 6, Indonesia; Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, 62032 Camerino MC, via S. Agostino 1, Italy
