SILVER(I) COMPLEXES WITH HETEROCYCLIC THIONES AND TERTIARY PHOSPHINESAS LIGANDS - PART 3 - SOLUTION BEHAVIOR OF MONONUCLEAR COMPLEXES OF SILVER(I) NITRATE - THE CRYSTAL-STRUCTURE OF ENYLPHOSPHINO)BIS(BENZOXAZOLINE-2-THIONE)SILVER(I) NITRATE

The preparation of a series of mononuclear mixed-ligand silver(I) nitr ate complexes of the general formula [Ag(PPh3)(2)(thione)(n)] [NO3] (n =1, 2; thione=pyridine-2-thione (py2tH),pyrimidine-2-thione (pymtH),4- methylpyrimidine-2-thione (MepymtH),4-aminopyrimidine-2-thione (NH(2)p ymtH), 4-hydroxypyrimidine-2-thione (OHpymtH), quinoline-2-thione (qui ntH), benz-1,3-thiazolidine-2-thione (btzdtH), and bent-1,3-oxazoline- 2-thione (boztH)) is described and their solid state and solution spec troscopic data reported. The crystal structure of [Ag(PPh3)(2)(boztH)( 2)] [NO3] is also reported and discussed with respect to analogous com plexes. The coordination geometry about the silver atom is distorted t etrahedral with mean Ag-S and Ag-P bond lengths of 2.67 and 2.49 Angst rom respectively and a nitrate ion forming hydrogen bridge with one of the thione NH-groups of the complex ion. The inequality of the Ag-S b onds together with the bulk of the thione account for the observed sol ution P-31 NMR spectra. (C) 1998 Elsevier Science S.A. All rights rese rved.