An Investigation of the Acceptor Properties of Some Organomercurials by Molecular Weight Measurements and X-ray Photoelectron Spectroscopy*
نویسندگان
چکیده
Stability constants from molecular weigth measurements for the complexes R2Hgbpy (bpy = 2,2'-bipyridyl) in carbon tetrachloride and benzene at 25 °C decrease in the order R = CaF5 > > p-HC6F4 = p-MeOC6F4 2':: o-HC5F4, and for R2HgOPPha, in the order R = o-HC6F4 > C5F5 > p-HC5F4 = p-MeOC5F4 with higher values in the former solvent. The unexpectedly greater stability of (o-HC5F4)2HgOPPha than (C5F5)2HgOPPha has been related to the structures of the parent mercurials. X-ray photoelectron spectroscopy shows that the acceptor properties of mercury compounds decrease in the order HgCl2 > (C5F5)2Hg = (p-HC5F4)2Hg = (o-HC0F4)2Hg > (p-MeOCoF4)2Hg > (C5Cls)2Hg 2':: Ph2Hg > Hg0• A similar study of RHgX compounds suggests that there is reasonable additivity of the electrophilic effects of different R and X groups on the mercury 4f binding energy.
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