Structural characterization of some adducts of the form [M2(μ-dppm)2(MeCN)X]X2 [M = Cu, Ag; X = ClO4, BF4, PF6; dppm = (Ph2P)2CH2; x=0-4]

Structural characterizations are reported for a number of adducts of the form [M-2(mu-dppm)(2)(MeCN)(x)]X-2 (M = univalent Cu, Ag; X = ClO4, BF4, PF6; dppm = Ph2PCH2 PPh2; x = 0-4) for (a) M = Cu, X = BF4, x = 4 (1), 3 (2); (b) M = Ag, x = 2, X = BF4 (3), X-2 = PF6, PO2 F-2 (4). Within derivatives 1 and 2, we find four-and three -coordinate copper atoms within the one species, with two and one acetonitrile molecules being coordinated, respectively; in 3 and 4, significant bridging interactions between the BF4 and PO2 F2 anions, and the silver atoms of the dimer respectively, are found. Electrospray-ionisation mass spectral studies of 2 and 4 in MeCN solution show that MeCN is only weakly bonded to the M2(dppm)2 core, the ions of major intensity being [Cu-2(dppm)(2)(BF4)](+) and overlapping [Cu-2(dppm)(2)](2+)/ [Cu(dppm)](+) for 2, and [Ag(dppm)(2)(PO2 F-2)r and [Ag-2(dppm)(2)](2+) for 4. (C) 2016 Elsevier B.V. All rights reserved.