Abstract
Two series of compounds LHgL′ are described. In series I, L = L′ = organic radical with an oxo group in position 2 or L′ = Cl, in series II, L = L′ = allylic radical or L′ = Cl. Some compounds possess chemical properties of conjugated systems (IA, IIA), while others do not possess such properties (IB, IIB). The J13C199Hg) coupling constants and chemical shifts in 13C NMR spectra, the integral intensities of multiple bond vibrations in Raman spectra, the half-wave reduction potentials and the resonance energies in mass spectra of the negative ions are compared. The main contribution to the observed differences between compounds A and B is made by interaction of the CHg σ-bond with the π-system (σ, π-conjugation).
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