A complex Ar⋯AgI produced by laser ablation and characterised by rotational spectroscopy and ab initio calculations: Variation of properties along the series Ar⋯AgX (X = F, Cl, Br and I)

Molecular geometries and other properties of H2O⋯AgI and H3N⋯AgI as characterised by rotational spectroscopy and ab initio calculations

“…Laser vaporisation of silver iodide in the presence of argon and a low concentration of H 2 O allowed the observation of intense features that assign to the AgI diatomic molecule. 35 Transitions of the Ar· · · AgI complex characterised previously 17 and a distinctive transition of the water dimer near 12 321 MHz 36 were also observed. Series of other transitions share some qualitative features of the spectrum of Ar· · · AgI but were clearly associated with a different molecular carrier.…”

“…This is different from the trend observed when these Lewis bases bind to silver chloride. 4,10,17 The ordering of the i c values displayed in Table VIII is also different from the ordering of complexes according to the value of the force constant, F 22 . It might be expected that the change in charge distribution across the Ag-I bond upon attachment of a Lewis base, as measured by the change in nuclear quadrupole coupling constant, will be approximately proportional to the strength of the interaction of the Lewis base with the silver atom.…”

“…Microwave spectroscopy has recently been applied to explore the molecular structures of complexes in which a Lewis base is attached to either CuX, AgX, or AuX (where X is a halogen atom) to form L· · · MX, [1][2][3][4][5][6][7][8][9][10][11] where, for example, L = H 2 O, 1,10 H 2 S, 3-5 NH 3 , 12 C 2 H 2 , 6,8,11 or CO. 13,14 The same technique has also been applied to study complexes that are similar in composition and structure but distinct in that L is not a typical Lewis base. For example, H 2 · · · MX, 15,16 Ar· · · MX, [17][18][19] Kr· · · MX, 18,20 and Xe· · · MX 21 have each been characterised. Significant structural changes were identified in each of H 2 , 15,16 C 2 H 2 , 6,8,11 and C 2 H 4 6 on their attachment to a coinage metal atom.…”