The effect of the solvent upon the rates and machanisms of organometallic reactions: VII. A 19F NMR study of complexation of CF 3 HgX (X = Cl, I, OCOCF 3)

Abstract

The concentration and temperature dependence of J( 199HgC 19F) for solutions of CF 3HgX (X = Cl, I, OCOCF 3) in various solvents shows that in inert solvents these molecules exist mainly as non-solvent dimers (X = I or OCOCF 3) or as monomers (X = Cl). In strongly coordinated solvents 1 2 complexes are largely formed from CF 3HgX and the electron-donating solvent molecules. In pyridine solution an equilibrium exists between the 1 1 and 1 2 complexes. Complexes of the type CF 3HgX·D are T-shaped and have a higher relative content of s-electrons in the HgCF group compared with tetrahedral CF 3HgX·2D complexes.