A magnetic double resonance study of some aryl and pentafluoroaryl mercury compounds

Abstract

It is shown that double resonance experiments can establish the relative signs of all the coupling constants in AA′XX′ spin systems, and the technique is applied to the ¹⁹F–¹⁹F couplings in perfluorophenyl mercury compounds. Heteronuclear double resonance experiments are used to show that all the ¹⁹⁹Hg–¹⁹F coupling constants in the compounds are positive, and that ³J(Hg–H_o) and ⁴J(Hg–H_m) are also positive in aryl mercury compounds. ¹⁹⁹Hg chemical shifts are quoted.