Synthesis and characterization of bis(triphenylphosphine)(ketone)silver and bis(triphenylphosphine)bis(ketone)silver complexes - Crystal structure of bis(triphenylphosphine)bis(diphenylcyclopropenone)silver tetrafluoroborate

The bis(triphenylphosphine)silver complexes of (phenalenone) 6, (diphenylcyclopropenone) 7, (tropone) 8, bis(phenalenone) 9, bis(diphenylcyclopropenone) 10 and bis(tropone) 11 were prepared by treating his(triphenylphosphine)silver tetrafluoroborate 5 with the respective basic ketones phenalenone 2, diphenylcyclopropenone 3 or tropone 4 in 1 or 2 equiv. amounts. The first crystal structure of diphenylcyclopropenone adduct (complex 10, (Ph3P)(2)(diphenylcyclopropenone)(2) Ag+BF4-) was determined confirming the silver to oxygen sigma-bonds, The complex 10 crystallizes in the monoclinic space group P2(1/c), with a = 10.419(3)Angstrom, b = 25.291(7)Angstrom, c = 20.711(4)Angstrom, beta = 91.916(4)degrees, Z = 4, V = 5454.6(24)Angstrom(3) R-F = 0.077, R-W = 0.083 for 7114 reflections. (C) 1997 Elsevier Science S.A.