Synthesis, crystal structure and Raman spectra of AgBF4·C3O3(NC3H5)3·H2O, a silver(I) π-complex with 1,3,5-triallyl-1,3,5-triazine-2,4,6-trione

AgBF4, in aqueous solution, reacts with 1,3,5-triallyl-1,3,5-triazine-2,4,6 (1H,3H,5H)-trione (TTT) yielding Ag[C3O3(NC3H5)3]BF4·H2O (I). It crystallizes in the monoclinic space group P21/n, a = 13.356(3) Å, b = 9.4264(17) Å, c = 13.360(3) Å, β = 94.057(2)°, V = 1677.8(5) Å3, and Z = 4. In the crystal structure I, Ag+ is coordinated by two Cdouble bond; length as m-dashC groups from two TTT molecules, one O atom from a water molecule and one more distant O atom from the triazine ring, markedly shifted from the ideal apical position. The TTT molecule uses only two allyl groups for metal bonding. The bridging role of the Ag+ cations and the TTT molecules results in the formation of infinite {Ag[C3O3(NC3H5)3]·H2O}n chains. The Raman spectrum of I supports weak Ag–(Cdouble bond; length as m-dashC) bonding.