Effendy, Giancarlo Gioia Lobbia, Maura Pellei, Claudio Pettinari, Carlo Santini, Brian W. Skelton, Allan H. White
New silver(I) derivatives containing triorganophosphines and the anionic dihydrobis(1-imidazolyl)borate [H2B(im)2]-, or the tetrakis(1-imidazolyl)borate ligand, [B(im)4]-, have been synthesized from reaction of AgNO3 with PR3 (R = phenyl, cyclohexyl, o-, m- or p-tolyl) or (PPh2R′) (R′ = methyl or ethyl) and K{H2B(im)2}·DMAC [DMAC = dimethylacetamide) or K[B(im)4]. Binuclear [Ag(PR3) 2{(im)BX2(im)}]2 or polymeric [Ag(PR 3){(im)-BX2(im)}]n (X = H or imidazolate) complexes have been obtained and fully characterized by elemental analyses and FT-IR in the solid state and by NMR (1H and 31P) spectroscopy and conductivity measurements in solution. Solution data are consistent with partial dissociation of complexes, occurring through breaking of both Ag-N and Ag-P bonds. The structures of [Ag{P(C6H 4Me-p)3}2{(im)BH2(im)}] 2·2CHCl3, [Ag{P(cy)3}{(im)BH 2(im)}]n and [{P(cy)3}-Ag{(im)B(im) 2(im)}]2·MeCN have been determined by single crystal X-ray studies. The [Ag{P(cy)3}{(im)BH2(im)}] n adduct is a single-stranded polymer containing three-coordinate silver atoms (PAgN2 core), while in the two other adducts, the silver atoms are four-coordinate (P2AgN2 cores). In all structures the two silver atoms are bridged by independent imidazolate donors from a pair of (im)BX2(im) moieties. © The Royal Society of Chemistry 2001.
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
