To each Ag are also coordinated two P atoms from two triphenylphosphine molecules. The coordination polyhedron around Ag is a distorted tetrahedron. The crystal structure is thus built up from discrete dimeric molecules.

Abstract. (AgCIP2C29H30)2 , monoclinic, P21~n, a= 13.428 (1), b=33.263 (4), c=12.414 (1) A, fl= 99"30(1) ° , V=5472 ]k 3, Z=4, Dc=1.43, Do=1.45 g cm -3. Two Ag atoms are joined both by doubly bridging CI atoms and by two molecules of 1,5-bis(diphenylphosphine)pentane. Each Ag is thus coordinated to two CI and two P atoms, the latter belonging to different ligand molecules. The coordination round the Ag and P atoms is distorted tetrahedral.

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Abstract. (AglPzSCzsHzs)2, triclinic, PT, a = 11.796 (2), b=10.108 (2), c=12.332 (3) ,A,, ~=96.45 (2), fl= 102.95 (3), 7=94.84 (2) °, V= 1415 .h3, Z= 1, DoRic= 1"62, Dobs = 1"61 g cm -3. Bis(diphenylphosphinoethyl) sulphide, [(C6Hs)2PC2H4]2S, acts as a bidentate bridging ligand with the two P atoms coordinating different Ag atoms. The S to Ag distances imply no coordination between these atoms. The ligands are connected twoand-two by P-Ag-P bonds. The Ag atoms are also joined by a double I bridge. The crystal structure is thus built up by discrete dimeric molecules, (AgIPzSCzsH2s)2. A comparison is made between the structures of the isotypic compounds (AgXPzSCzsH28)2, X = I and CI.