Vibrational spectra of some trichloromethyl- and trifluoromethyl-mercury(II) compounds

Abstract

Complete assignments of vibrational fundamentals of [Hg(CF₃)X](X = Cl, Br, I, or CF₃) and [Hg(CCl₃)X](X = Cl, Br, or CCl₃) are presented on the basis of i.r. and Raman spectra of solutions, in which the molecules appear to be monomeric. The spectra of the solids, including Raman measurements at 100 K, are also discussed in relation to crystal structures where known. The intensity of the Hg-CF₃ stretching mode, relative to other CF₃ modes, shows marked dependence on the trans halide in [Hg(CF₃)X].