Mercury(II) Electrophiles as Electron Acceptors. Charge-Transfer Complexes with Organometal and Aromatic Donors
Novel charge-transfer (CT) absorption bands are reported for electron donor-acceptor complexes of mercuric chloride and a series of tetraalkyltin compounds.The CT transition energies hvCT are correlated with ionization potentials ID of the alkylmetals.Steric interactions within these complexes are larger than those previously examined in the corresponding iodine and bromine complexes, which suggest that the mercury(II) acceptor is intimately associated with the organometal donor.The latter coincides with the observation of multiple charge-transfer absorption bands in hexamethylbenzene complexes of various mercury(II) derivatives, shown to arise distortion of the linear X-Hg-X .Bent structures are proposed for both ? and ? complexes of mercury(II) derivatives.