Silver(I) poly(1,2,4-triazolyl)borate complexes containing monodentate phosphane ligands

New silver (1) derivatives containing monodentate tertiary phosphanes and anionic poly(triazol-1-yl)borate ligands have been prepared from the reaction of AgNO3 and PR3 (R = Ph, Bn, o-tolyl, m-tolyl, p-tolyl) and potassium dihydrobis(1,2,4-triazolyl)borate, K[H2B(tz)(2)], or potassium hydrotris(1,2,4-t riazolyl)borate, K[HB(tZ)(3)]; their solid state and solution properties have been investigated through analytical and spectroscopic measurements (IR, H-1-, and P-31 NMR). The H-1- and P-31 NMR solution spectra in some cases can be interpreted on the basis of a dissociation of [{HB(tZ)(2)}Ag(PR3)(2)] into [{H2B(tz)(2)}Ag(PR3)] and PR3. All the compounds are soluble in chlorinated solvents and are non-electrolytes in CH2Cl2 and acetone solutions. [{H2B(tz)(2)}Ag(PPh3)(2)] and [{H2B(tz)(2)}Ag{P(M-tolyl)(3)}(2)] are simple mononuclear arrays, the silver atoms lying in four-coordinate N2AgP2 environments. Owing to the presence of the methyl substituents on the phosphane ligand, the complex [{HB(tz)(3)}Ag{P(o-tolyl)(3)}] as expected, is mononuclear. In [{H2B(tz)(2)}Ag{P(p-tolyl)(3)}], the silver environment is still four-coordinate but PAgN3, Utilizing the coordinating capability of one of the additional ('exo'-) ring nitrogens not only to complete the four-coordinate array about the silver but, necessarily, to link successive asymmetric units into a single-stranded polymer. (c) 2004 Elsevier B.V. All rights reserved.