Synthesis and structure of silver halide complexes [Ph3PCH=CH2]n[Ag2Br3]n, [Ph3PCH=CH2]n[Ag5Br6]n and [Ph3PCH2CH=CHCH2PPh3][Ag2I4]

By the interaction of silver bromide with (2-bromoethyl)- and vinyltriphenylphosphonium bromides, as well as silver iodide with but-2-ene-1,4-diyl-bis(triphenylphosphonium) diiodide in DMSO, haloargentate complexes [Ph3PCH=CH2]n[Ag2Br3]n (I), [Ph3PCH=CH2]n[Ag5Br6]n (II) and [Ph3PCH2CH=CHCH2PPh3][Ag2I4] (III) were synthesized. The obtained products were characterized by IR spectroscopy and X-ray diffraction analysis (CCDC No. 2173339 (I), 2172944 (II), 1985085 (III)). According to X-ray diffraction data, compounds I–III consist of organyltriphenylphosphonium cations with tetrahedrally coordinated phosphorus atoms and the corresponding haloargentate anions of 1D-polymeric (I, II) or non-polymeric (III) structure. The anions I and II are “cross-linked” from tetrahedral {AgBr4} fragments, while anion III – from two trigonal fragments {AgBr3}. In all the resulting complexes, the Ag centers are additionally connected to each other by argentophilic contacts with Ag···Ag distances in the range of 2.8162(12)–3.371(2) Å.